Police have named two of the London Bridge attackers, who drove a van into pedestrians and stabbed bystanders before being shot dead by police.Their names were given as Khuram Butt and Rachid Redouane.
They said Butt, who was 27, was a Pakistan-born British national known to MI5.
Redouane, a 30-year-old who police said was claimed to be of Moroccan and Libyan descent, was not known to British authorities however.
They said he also went by the identity Rachid Elkhdar.
Police said there was no evidence the attack had been planned.