A man accused of targeting four politicians in Minnesota, killing one of them and her husband, has appeared in a federal court
Vance Luther Boelter, 57, is charged with killing Melissa Hortman, a Minnesota Democrat, and her spouse Mark
State Governor Tim Walz called it a "politically motivated assassination"
Officials have described his plan to conduct a killing spree in the early hours of Sunday morning as he visited four homes belonging to state lawmakers
Boelter has yet to enter a plea and will face court again on 27 June
He is also alleged to have shot and wounded Democratic State Senator John Hoffman, and his wife Yvette, who are both now awake in hospital
The arrest follows what was described as the largest manhunt in Minnesota's history
Boelter, 57, is believed to have impersonated a police officer and escaped after engaging fire with officers early Saturday morning in suburban Minneapolis
Watch: Minnesota governor Tim Walz confirms Vance Luther Boelter’s arrest
Jeremy Geiger, assistant chief at the Minnesota state patrol, says no law enforcement officer suffered injury during the arrest of Boelter.
Air support and SWAT teams were deployed, he adds.
The chief of police of Brooklyn Park, Mark Bruley, is now speaking, and he calls the manhunt the largest in the state's history.
Brooklyn Park is the suburb of Minneapolis where Melissa Hortman lived with her family.
Hortman and her husband were killed in the attack in the early hours of Saturday.
Bob Jacobson, the commissioner of public safety for Minnesota, says the suspect "exploited the trust our uniforms are meant to represent."
Boelter impersonated a police officer while carrying out the attacks.
"That betrayal is deeply disturbing to those of us who wear the badge with honour," Jacobson adds.
Drew Evans, superintendent of the state’s Bureau of Criminal Apprehension, is describing how the suspect Vance Boelter was taken into custody.
He reads out a long list of local, state and federal law agencies who were working together on the scene
Evans says the suspect was caught near the village of Green Isle – not far from his home.
Tim Walz continues by making a plea for civility.
"This cannot be the norm. It cannot be the way we settle our political differences," he says, urging people to "shake hands, find common ground".
Tim Walz, Minnesota's governor, confirms that at the end of a "complex and dangerous manhunt" the suspect has been arrested.
Walz says that his actions have "altered the state of Minnesota".
Mike Wendling
Reporting from Minnesota
Police have been on the scene of the arrest - near suspect Vance Luther Boelter's home - for most of Sunday.
We first heard of activity before noon local time. A car linked to Boelter and a cowboy hat which authorities also suspected belonged to him were found along a rural road.
Hundreds of local, state and federal police were on the scene, and we saw dogs, bomb squads, SWAT teams and aircraft. It was a huge undertaking.
It now appears that the net was closing in on Boelter all along.
We'll have more news very shortly as Minnesota Governor Tim Walz and law enforcement authorities are due to give an update any moment now.
Bob Jacobson, commissioner of public safety and Drew Evans, superintendent of the Bureau of Criminal Apprehension will also speak, along with local officials.
A photo showing the arrest of the suspect, Vance Luther Boelter, was released by the Ramsey County Sheriff's Office.
In a Facebook post, the office says: "The face of evil. After relentless and determined police work, the killer is now in custody.
"Thanks to the dedication of multiple agencies working together along with support from the community, justice is one step closer."
Image source, Ramsey County Sheriff's OfficeMinnesota police have apprehended a suspect involved in shooting two state legislators, and have taken him into custody, according to several media outlets including the BBC's US media partner CBS News.
Stay with us as we bring you the latest.
...but we'll fire it back up if there's any major breaking news in this manhunt.
Today's major development was investigators found a car used by the suspect, Vance Luther Boelter, and what they think may have been his hat nearby, in Sibley County, about 50 miles (80km) from the murder scene.
One local resident, Brian Liebhard, told the BBC in Sibley County: "This guy needs to get caught.
"I don't agree with everything they [the two politicians] vote for, but this is sad - the guy went wacko."
Investigators also disclosed that Boelter's wife had been detained in a traffic stop along with three relatives in the city of Onamia, more than 100 miles from the family home, on Saturday morning.
Jenny Boelter was released without being taken into custody.
Two victims of the attack, Senator John Hoffman and his wife, Yvette, are awake in hospital and are expected to issue a statement when able.
Evans addresses concerns about ongoing threats to state lawmakers.
He says the safety of lawmakers and public servants remains a top priority.
Evans says the current indication is that the suspect acted alone.
Evans says he would not describe the documents in the car as a "manifesto".
"That's a treatise on all kinds of ideology and writings," he says.
Instead he describes it as a notebook with a list of names, including lawmakers.
"I don't want the public to have the impression that there's this long manifesto that's providing all of this information and details," he says.
He says he cannot comment further because it is an active investigation.
Asked whether he believes the suspect may be trying to leave the country, perhaps bound for Canada, Evans says they have no evidence he could be heading for a specific destination.
Responding to a question as to whether Boelter is on foot, Evans says they are not sure how he is getting around.
"It could be multiple ways that he has travelled, and that's open, and that's why you see... a very large perimeter, because they're looking at various modes of transportation."
Evans says they are "certainly operating as though he's still alive".
Evans confirms that authorities have spoken with Jenny Boelter, the wife of suspect Vance Luther Boelter.
Authorities pulled her over on Saturday morning in Onamia, Minnesota.
"So we met with his family, not just his wife, but other family members, to really understand what's going on," he said.
He notes that during any investigation, police would meet with the family of a potential suspect.
Evans says no family member of the suspect is in custody, and they were released because they were co-operative.
Drew Evans, of the Minnesota Bureau of Criminal Apprehension, says it has been a "very fluid day".
He mentions how police found a vehicle in Sibley County that they believe was used by the suspect, Vance Luther Boelter.
Evans also confirms they recovered a hat believed to have been worn by the suspect "in proximity" to the vehicle. He asks the public to remain vigilant.
There have been more than 400 tips so far as the manhunt continues.
We hear next from Drew Evans, superintendent of the Minnesota Bureau of Criminal Apprehension.
He confirms there is a nationwide warrant for the suspect's arrest for the murders and attempted murders in this case at a state level, as well as at a federal level.
There are also warrants for his arrest for "unlawful flight to avoid prosecution".
Mayor Hollies Wilson of Brooklyn Park is next.
He says "prayers of support go out to the families of the Hoffmans and the Hortmans".
He says Hortman had an impact on "unifying our communities and bringing them together".
"There is some healing that needs to be done here," he says.
The mayor also asked people to "avoid not sharing or sharing misinformation".
A press conference has just started to provide an update on the manhunt for Vance Luther Boelter.
Mayor Ryan Sabas of Champlin called it a "senseless and tragic act that has shaken us all".
"But in our darkest hours, we are reminded of the strength and resilience of community. We come together, not only to grieve, but to stand strong and together, we will rise the heinous act should never have happened."
Mike Wendling
Reporting from Green Isle, Minnesota
Image source, Getty ImagesResidents of Green Isle, Minnesota have come out to watch the police search
In Green Isle - a small village where police have set up command post - the local gas station has closed for the day, citing safety concerns.
A few local residents have come out to see what's going on and a police helicopter has just landed on the village's baseball field.
We're still awaiting more news about the manhunt.
Image source, BBC / Mike WendlingA sign taped to a gas station window in Green Isle Minnesota says "Sorry for any inconvenience, we are closed to keep our families and employees safe during this critical time".