Stephanie and her daughter Kennedy tell BBC News about their "frightening" experience.

Security is very tight this morning in Manchester city centre - not least in and around Piccadilly railway station, reports BBC Radio Manchester's Kate West.

All the UK's major political parties have suspended campaigning for the general election in response to the suspected terror attack in Manchester that killed 19 people.

Labour leader Jeremy Corbyn said he had spoken to Theresa May and they had agreed that all national campaigning would be suspended until further notice.

The prime minister will chair a meeting of the Government's emergency Cobra committee this morning.

Liberal Democrat leader Tim Farron called off an election visit to Gibraltar and the SNP has postponed their planned manifesto launch.

Labour joins the Lib Dems, SNP and the Conservative Party in suspending election campaigning.

BBC correspondent Ed Thomas was near Manchester Arena in the early hours of Tuesday morning. He tells us what we know so far from the scene where one explosion killed 19 people and injured more than 50.

Greater Manchester Police tweets...

Scotland's First Minister Nicola Sturgeon has cancelled the SNP's manifesto launch and suspended election campaigning in the wake of the suspected terror attack.

Ms Sturgeon also paid tribute to the victims of the Manchester Arena blast.

She said: "My thoughts are with the victims, their families and all those who have been affected by this barbaric attack in Manchester.

There will be extra officers on trains and at stations on Tuesday, British Transport Police said.

BBC presenter Rachel Burden tweets...

People are encouraging others nearby to donate blood for the victims of the attack.

BBC North West has a comprehensive list of changes to Northern Rail.

Police are treating Monday night's blast at Manchester Arena as a terrorist incident.

If confirmed to be a terrorist attack it would the worst terror atrocity in the UK since 52 people were killed in the London bombings of July 2005.

For more than two years the official threat level for international terrorism in the UK has stood at "severe" - indicating that an attack is highly likely.

This is the second highest out of five levels, one below critical - which means an attack is expected imminently.

Officers were stationed outside the city's main station, as well as at Manchester Victoria.

North West Ambulance Service tweets...

Nineteen people have died and more than 50 were injured in a suspected terror attack at Manchester Arena.

The blast happened at the end of a concert by US singer Ariana Grande.

• The arena said the explosion happened outside the venue, as people began streaming from the doors

• Greater Manchester Police were called to the scene at 22.35 BST on Monday and surrounding roads were closed

• The cause is unknown but PM Theresa May said police were treating it as "an appalling terrorist attack"

Click here to see a summary of what we know so far.

BBC correspondent Sarah Corker said people were being treated for crush and shrapnel injuries.

She said people were being offered taxis home if they were stranded and rooms in nearby hotels.