United Kingdom police make 16th arrest over Manchester bombing

Six days after 22-year-old Salman Abedi launched his attack on a pop concert, killing 22 people, a British minister said that members of the suicide bomber's network could still be a large.

Great Manchester Police said a 23-year-old man was arrested Monday in Shoreham-by-Sea on suspicion of terrorism offenses.

Interior Minister Amber Rudd told Sky News that this was a "right first step" for MI5 to take in the wake of the bombing that killed 22 people at a pop concert by USA singer Ariana Grande. Two people were released after questioning without charge, police said. More than 20 people were killed in an explosion following a Ariana Grande concert at the Manchester Arena late Monday evening.

Earlier on Sunday, Home Secretary Amber Rudd said investigators can not be entirely sure that Salman Abedi's terror network has been dismantled - and warned other members of the bomber's group are "potentially" still at large.

Police have been hunting for a network of people connected to Abedi, with Britain's interior minister Amber Rudd saying on Sunday there were "potentially" still members of the cell at large.

"It is surprising because these people are just under your nose and you don't know it", said Harpreet Lota, a Manchester resident walking past the building. Another brother and Abedi's father have been detained in Libya.

Counter-terrorism agencies are said to have placed the 22-year-old on a watch list after he was reported on five separate occasions for his extremist views. Police were also searching another address in the south of Manchester.

Greater Manchester Police said on Sunday that they had arrested a 14th person in connection with the attack.

Britain's MI5 Security Service has started an internal review on whether there are lessons to be learned from its handling of intelligence on Abedi's attack.

On Saturday, Prime Minister Theresa May lowered the threat level from its highest rating "critical", meaning an attack could be imminent, to "severe".

A senior Whitehall source previously revealed the mass murderer was a "former subject of interest" to the security services whose risk "remained subject to review".

Abdedi was known to British security officials before the bombing, the government said, but Rudd declined to comment on exactly what had been known about him.

Another option is a Temporary Exclusion Order (TEO), which can be used against British citizens suspected of involvement in terrorist activity overseas.

The statement released through police added: 'I wish I could say that Georgina is one of the last to die in this way but unless our Government opens its eyes we know we are only another in a long line of parents on a list that continues to grow'.