Police have made “significant arrests and finds” in their inquiry into the Manchester Arena bombing, according to the UK’s top counter-terrorism officer.
Assistant Commissioner Mark Rowley said they had “got hold of a large part” of the terror network they believe bomber Salman Abedi had been a part of.
“Immense” progress has been made, he added, but more arrests were likely.
Amid increased security at UK events, Mr Rowley also urged the public to “go out as planned and enjoy yourselves”.
He added that police have reviewed security at more than 1,300 events across the country, and people could be “100% confident” they are doing everything possible to protect them.
But for the investigation team, he said, there were still “important” lines of inquiry to pursue, and the security level will not yet be reduced from “critical”.
A senior security source told BBC News the threat level was “critical” partly because of concern at so-called “copy-cat” attacks, as well as fears about the Manchester network.
The Chief Constable of Greater Manchester Police, Ian Hopkins, said 12 locations were still being searched. These operations, as well as one at Manchester Arena, will continue over the weekend.
He said thousands of items had been gathered by officers and are now being assessed, though he would not say whether they could have been used to make explosive devices.