Six people are unaccounted for, officials tell reporters. This is down from a previous report of seven.

Two other people were found - one was taken to hospital, and the other was uninjured.

The state transportation secretary says the six are believed to be part of the construction crew that was working on the bridge at the time it collapsed.

He adds that officials do not believe there is anyone missing that was in a vehicle when the span fell.

Image source, CBS

Special agent Bill DelBagno of the FBI's Baltimore field office confirms there is "no credible information" that terrorism could be behind the bridge collapse.

He says the probe into the crash is ongoing, urging patience from the people of Baltimore as they continue to piece together what happened.

Image source, CBS

Maryland Transportation Secretary Paul Wiedefeld says workers who were on the bridge at the time of the collapse were repairing potholes.

Wiedefeld says engineers are on site now determining the structural impact of the collapse.

He said his team was going to work closely with the National Transportation Safety Board to determine the effects of the incident.

Image source, CBS

Senator Chris Van Hollen from Maryland starts his remarks by saying that his heart goes out to all of those who were on the bridge and their loved ones.

"We pray for them," he says.

He says the federal government has provided support, including the US Coast Guard, who are assisting with the ongoing search and rescue mission.

Emergency funds will also be quickly released by the federal government to assist, Van Hollen says.

Governor Moore says there is no sign of foul play in the collapse.

“The preliminary investigation points to an accident,” he says.

“We haven’t seen any credible evidence of a terrorist attack.”

Speaking to reporters, Maryland Governor Wes Moore says: "Our state is in shock."

He thanks first responders for arriving quickly on the scene.

"I am in awe of you," he says. "I am in awe of your courage. I am in awe of your strength.

"You saw a crisis and said 'What can I do to help?'"

He says the emergency crews, including divers and air assets, are doing everything in their power to rescue victims of the collapse, "literally as we speak".

Moore says officials will continue to provide updates as they get them.

Maryland officials are giving an update - you can watch live by pressing play at the top of this page.

Bernd Debusmann Jr
Reporting from Dundalk, Maryland

I've just arrived at the place where local authorities are planning to have a news conference soon.

There are dozens of news crews here, hailing from places as faraway as Germany and Asia.

The main question on everyone's mind continues to be what exactly happened and whether it could have been avoided. The bridge is visible in the background, with the shipping containers on the vessel clearly visible behind the podium.

We also may hear updates about the search and rescue effort and casualties.

Stay with us for more updates.

• The Francis Scott Key Bridge in Baltimore, Maryland collapsed on Tuesday around 01:30 EST (05:30 GMT) after it was hit by a container ship
• A massive search and rescue effort is now underway. Officials say at least seven people are missing
• Two have been rescued, one of whom is in a serious condition
• Sonar has detected multiple vehicles in the water
• Maryland Governor Wes Moore said in a statement that he had declared a state of emergency
• The Singapore-flagged ship, named Dali, was bound for Colombo, Sri Lanka, but is now wedged into debris from the bridge
• The crew members, including two local pilots were not badly hurt and have all been accounted for

Maryland's governor Wes Moore and other officials are set to give a live update shortly - stay with us as we bring you the latest developments.

Tom Bateman
Reporting from Baltimore

A witness near the scene of the bridge collapse said he was woken up by the noise of the Francis Key Scott bridge collapsing after being struck by the container ship.

"I felt it," John Flansburg, who lives near the water in Baltimore, said. "The whole house shook."

"There are pieces of the bridge sticking out of the water, the ship is sitting there.

"I just hope the lord takes care of the people... today's not going to be a good day. A lot of tragedy."

Bernd Debusmann Jr
Reporting from Dundalk, Maryland

This is the scene at the entrance to the bridge.

It's eerily quiet, with the exception of buzzing helicopters - I now count four - and rescue boats speeding by.

There is no traffic, and this end of the bridge - slightly west of where it collapsed - is blocked by at least a dozen police cars, which include local officers and Maryland State Troopers.

One helicopter is flying extremely low, just above the surface of the water near where the collapse took place.

One person is undergoing medical treatment following the collapsed Baltimore bridge.

Michael Schwartzberg, a spokesperson for the University of Maryland Medical Center, told CNN: "The R Adams Cowley Shock Trauma Center at the University of Maryland Medical Center received one patient from this incident.

"They are still in the process of being triaged/ evaluated."

No further information about the patient's condition was given.

Earlier, Baltimore's Fire Chief James Wallace said at least two people have been rescued, as the search for survivors continues.

Officials estimate there are at least seven others missing but noted that the number of missing people could change.

The collision of the ship with a supporting pylon caused the complete collapse of the bridge.

Here's what it used to look like:

Image source, Reuters

Darlene Irwin, who lives nearby the Key Bridge, told the BBC that she first noticed something was wrong when she heard a "rumbling sound" in the middle of the night.

She said it only lasted a couple of seconds. "I wasn't sure what it was," Irwin said.

But soon enough, she heard the news that the bridge had collapsed.

She then went outside to look in the direction of the bridge, when daylight hadn't dawned yet on the city.

"We couldn't see much, just the blinking lights," Irwin said, adding that she was in disbelief.

"You're looking at it, but you just don't think it's something that could happen."

She said her first thoughts were of how many people may have been on the bridge when it fell into the water.

"To see it now in the daylight," she said, "it is just tragic."

An unclassified memo from the government agency CISA - the Cybersecurity and Infrastructure Security Agency - has confirmed that the Singapore-flagged vessel Dali "lost propulsion" and collided with "a supporting tower of the bridge".

Gary O'Donoghue
Reporting from Baltimore

Looking at the scene from the Stoney Beach residential community on the south side of Baltimore harbour, you can see the cargo ship with containers stacked on its decks, the remnants of the Francis Scott Key bridge sticking out of the water.

A man who was working on the Singapore-flagged ship, the Dali, before it left port tells us there were about 3,000 containers on it.

Residents are in shock at what's happened.

As rescuers search for the missing, the waters are very choppy. Officials say the water temperature was around 48F (9C) at the time of the collapse.

This is a search and rescue mission now and the tide is coming in, which is going to make the rescuers' job even harder.

They are still looking for at least seven people who they say may be in the water.

Here are a couple of images supplied by the Baltimore City Fire Department from the scene - the vessel is pictured wedged under the bridge, and the rest of the span has collapsed into the water.

Image source, Baltimore Fire Station

Image source, Baltimore Fire Station

Bernd Debusmann Jr
Reporting from Dundalk, Maryland

One huge concern for rescue crews this morning will be the weather. It may be spring, but it's cold.

At the moment, it's about 3C near the site of the bridge. But with wind chill factored in, it's 0. My hands are frozen stiff and I'm struggling to type on my phone. Most of the police and rescue crews nearby are wearing thick jackets, wool hats and gloves.

The water temperature will of course be colder - and local officials this morning have said that will be a huge concern as rescue crews continue to search for those who are missing.

Survivability in these temperatures is a matter of hours, at best - making this a race against the clock for emergency responders.

Image source, Reuters

We've just heard from Maryland's secretary of transportation, Paul Wiedefeld, who provided an update to reporters along with the US Coast Guard.

Wiedefeld said that there were contractors who were working on the bridge at the time of the collapse, who were "doing some concrete deck repair".

He added that vessel traffic in and out of the Port of Baltimore - with the exception of trucks - has been suspended as the search and rescue mission continues.

Traffic on the I-695 highway, which the bridge is part of, has been detoured.

A spokesperson for the US Coast Guard told reporters that their primary mission right now is to look "for any survivors in the water".

They have deployed three small boats on the scene, an 87-ft patrol boat, as well as helicopters.

Wiedefeld said there are no confirmed fatalities at this time and also stressed that it is too early in the investigation to know exactly what caused the collapse.