Manchester Arena blast: what we know so far

Here is what we know so far about the terrorist attack at Manchester Arena that targeted young concert-goers.

A 23-year-old was arrested in south Manchester in connection with the incident on Tuesday.

Olivia Campbell, John Atkinson, Kelly Brewster and PR manager Martyn Hett were also named as victims of the attack and Angelika and Marcin Klis are believed to be a Polish couple who died after going to Manchester Arena to collect their daughters from the concert.

A controlled explosion was carried out on Tuesday afternoon, as part of the investigation, at an address in Fallowfield.

Armed troops are deployed to guard “key locations” such as Buckingham Palace, Downing Street, the Palace of Westminster and embassies. The Palace of Westminster is closed to the public and the Changing the Guard ceremony at Buckingham Palace is cancelled to redeploy police officers.

Home Secretary Amber Rudd said Abedi was known to the intelligence services “up to a point”, while French interior minister Gerard Collomb said Abedi is believed to have travelled to Syria and had “proven” links with the Islamic State terror group. Mr Collomb told French television that both British and French intelligence services had information that Abedi had been in Syria.

Greater Manchester Police Chief Constable Ian Hopkins said officers are carrying out “extensive searches” across Manchester, adding that “it’s very clear this is a network we are investigating”.

The Government activated Operation Temperer, providing up to 3,800 troops to support the police in their security operations. Ms Rudd said that 984 military personnel have been deployed.