Suspects Associated With Tunisia Attacker Held

Seven people are being interrogated as part of the investigation into the deadly beach resort attack that killed 38 people in Tunisia.

Tunisia's Interior Minister Najem Gharsalli said a group of suspects potentially linked with gunman Seifeddine Rezgui have been detained.

Four people were arrested today - two in the resort town of Sousse, one in Tunis, and another in Kasserine - while another three were arrested on Sunday.

It's believed at least 30 Britons were among those killed when Rezgui opened fire on tourists at the beach in Sousse.

Authorities have been investigating whether the 24-year-old was working alone or if he had accomplices.

Mr Gharsalli did not give further details about the arrests, but said officials were still verifying whether Rezgui had been trained in jihadist camps in neighbouring Libya.

Islamic State has claimed responsibility for last Friday's assault on the Imperial Marhaba hotel.

"We have started by arresting a first group, a significant number of people, from the network that was behind this terrorist criminal," Mr Gharsalli said at a joint press conference with his German, French and British counterparts.

"We will find all those involved, whether it was just logistical support or not," he added.

Earlier Home Secretary Theresa May went to the scene of the attack and called it a "despicable act of cruelty".

Officials confirmed that the total number of Britons killed is likely to reach "around 30", and said that the UK is pressing Tunisian authorities to ensure swift access for British experts who have been sent to help identify remaining bodies.

Prime Minister David Cameron said a minute of silence will be held in Britain on Friday to remember the victims of the attack.

Rezgui's father has spoken of his shame and apologised for his son's actions, saying that he had found the news difficult to "comprehend".

Hakim Rezgui said: "My god, I am so shocked. I don't know who has contacted him, influenced him or who has put these ideas in his head. He has new friends who got him into this."

The gunman's aunt, Zara Rezgui, described him as a "blank page", but a kind, calm, "normal boy" who spent most of the time alone.

Witness Lee Inwood, from Norfolk, said the killer was among their number and had "confronted" his wife Angela shortly before launching the murderous assault.

The couple were walking towards the sea when she stumbled on a children's spade and nearly fell into the group, Mr Inwood told Sky News.

Mr Inwood said they were acting "very strangely" and the women were taking photos of the men with tourists' children and also pictures of holidaymakers on sunloungers without permission.

He said "something was not right, it feels weird" and claimed local people do not normally "hang around" that area and leave the tourists alone.

Mr Inwood also said he was told by his hotel director that there were three gunmen in the attack, not just one that authorities claimed.

"It didn't feel like a lone person attack at all," Mr Inwood said.

It has also been reported that police divers have located what they say is the attacker's phone.

Since the attack, videos have emerged of Rezgui - barefoot and dressed in a black T-shirt and shorts - clutching a gun and running across the beach.

Other footage also shows Rezgui break-dancing, and he has been reported as being well-known for entering competitions in the capital Tunis.