British police carried out a fresh raids Sunday in the wake of last week’s Manchester Arena explosion that left 22 people dead.

The Guardian reported explosions accompanied the raid at the home of what neighbors said was a Libyan family near Quantock Close and Selworth Road in Manchester Sunday afternoon. At least one person was detained.

Read: Do Encryption Apps, Social Media Help Terrorism?

Raids also were conducted Sunday evening at two other addresses in Rusholme and Gorton.

“I heard a loud bang and then strangely people started to run towards the bang. Police were in the street then lots of police vans came minutes later and lots of officers got out of the vans. I left quickly as I had my child with me,” Nick Bowden, who saw the Rusholme raid, told the Guardian.

Police have arrested 14 people since the Manchester Arena suicide bombing, two of whom were released without being charged. The detainees include members of the bomber’s family and friends, along with people of Libyan heritage. In addition to the deaths, 116 people were injured, police said. The bombing came just after a concert by Ariana Grande had ended.

Read: St. Petersburg Bombing Gets Little World Sympathy, Country's Media Says

The bomber was identified as Salman Abedi,22, who was born in Britain and was of Libyan descent. Home Secretary Amber Rudd warned members of his network still could be at large, but officials have reduced the terror threat level to severe from critical.

Rudd told the BBC it is unclear how many jihadists have returned to the United Kingdom after traveling to war zones. Abedi is known to have traveled to Libya but it was unclear whether he was in Syria. She said the government has implemented exclusion orders for the first time, preventing certain people from entering the United Kingdom, and British intelligence is investigating some 500 plots involving 3,000 people. She said 20,000 more people are believed a lesser risk.

Investigators are trying to trace Abedi’s movements for five days before the attack and released pictures of him to the public, showing him dressed casually and wearing glasses. The Guardian reported police think Abedi had help making the bomb, which included bolts, screws and other deadly shrapnel.

“We are getting a greater understanding of the preparation of the bomb. There will be more searches but the greater clarity and progress has led JTAC [Joint Terrorism Analysis Centre], the independent body which assesses threat, to the judgment that an attack is no longer imminent,” top counterterrorism officer Mark Rowley said Saturday.

City officials declined to cancel planned weekend festivities in the wake of Monday’s bombing. Tens of thousands of people watched some 40,000 runners participating in the Great Manchester Run Sunday. Carl Austin-Behan, former Lord Mayor of Manchester, said the huge turnout indicated the city was not going to be intimidated by the bombing.

“There will have been a lot of people who were a bit hesitant about coming, but will then have thought, ‘Let’s prove a point and show solidarity,’ ” he told the Guardian.

Some 50,000 people also attended a concert Saturday at the LCCC Old Trafford cricket ground ahead of the race amid heightened security.

“If you think you can beat us, you don’t know who we are,” Courteeners frontman Liam Fray told the crowd. The group included “Don’t Look Back in Anger” among its playlist.

manchester The city of Manchester refused to cancel planned weekend festivities in the wake of Monday's suicide bombing at the end of the Ariana Grande concert at Manchester Arena. Above: Police protect runners at the Great Manchester Run, May 28, 2017. Photo: Phil Noble/Reuters

People have donated 5.65 million pounds ($7.24 million) to the We Love Manchester Emergency Fund set up in a partnership with the British Red Cross. The city’s tattoo artists also have started a campaign to raise money for victims and their families, offering to ink the city’s bee symbol for 50 pounds ($64).