Police investigating the London terror attack have made three fresh arrests, following raids involving armed officers in east London.

Two men were arrested on suspicion of terrorism offences and a third man was arrested on suspicion of drug offences.

Seventeen people have now been arrested in connection with Saturday’s attack and five remain in custody. Eight people were killed when three men drove into pedestrians on London Bridge before stabbing people.

All of those who died in the attack, which began at 21:58 BST on Saturday, have now been named.

The latest arrests were made as counter-terrorism officers carried out two search warrants in east London on Wednesday night. Two men were arrested on a street in Ilford, the Metropolitan Police said.

One of the men, aged 27, was held on suspicion of the preparation of terrorist acts, while a 33-year-old man was arrested on suspicion of possession with intent to supply controlled drugs. A third man, aged 29, was arrested on suspicion of the preparation of terrorist acts at an address in Ilford.

Police have named Youssef Zaghba, a 22-year-old Moroccan-Italian man who lived in east London, Khuram Butt, 27, from Barking, and Rachid Redouane, 30, who also lived in Barking, as the men who carried out the attack.

Footage of the three attackers apparently meeting at about 00:10 BST on Monday 29 May – five days before the attack – has been published by the Times. CCTV footage shows the men meeting outside a gym in Barking, according to the newspaper.

It shows Redouane throwing his mobile phone on the floor and walking off camera with the other two attackers, for about 10 minutes, before returning to collect his mobile. The footage has been passed to police, the Times added.

It comes as a British Transport Police officer who was seriously injured after confronting the three attackers armed only with a baton has said he did “everything I could” to fight them off. The officer, who has not been named, has been praised for his bravery and added: “I want to say sorry to the families that lost their loved ones. I’m so sorry I couldn’t do more.” He also thanked the police officers who treated him and “kept me alive” after the attack, adding: “I wouldn’t be here if it weren’t for them.”

On Wednesday, NHS England said 29 patients remain in London hospitals, with 10 in a critical condition.

The family of French national Alexandre Pigeard, a waiter at Boro Bistro, in Borough Market, said he was stabbed to death while working on the restaurant’s terrace. “Alexandre was a marvellous son, a perfect older brother and a radiant young man,” they said in a statement. “All his friends praised his kindness, his good humour and his generosity.”

On Wednesday, police searching for French national Xavier Thomas, 45, said they had recovered a body from the Thames, bringing the death toll to eight. Mr Thomas’s next of kin have been told, police said, but formal identification has not yet taken place.

The prime minister of Spain said Ignacio Echeverría, 39, who died defending a woman with his skateboard, should be given a posthumous award – the Silver Cross of the Order of Civil Merit. Mr Echeverría was from Madrid and was working for HSBC bank in London.

Another victim was named as Sebastien Belanger, from France.

Mr Belanger worked at the Coq d’Argent near Bank. He had been watching the Champions League final with friends at a nearby pub before the attack.

The others killed in the attack have been named as Australians Sara Zelenak and Kirsty Boden, Canadian national Chrissy Archibald, and James McMullan, from Hackney, London.

Meanwhile, speaking at her house in Bologna, Italy, Zaghba’s mother said she believed her son was radicalised in the UK. She said her son was under surveillance when he was in Italy and questioned why this was not the case in the UK.

An Italian police source confirmed  that Zaghba had been placed on a watch list, which is shared with many countries, including the UK.

In March 2016, Italian officers stopped Zaghba at Bologna airport and found IS-related materials on his mobile phone. He was then stopped from continuing his journey to Istanbul.

He was not prosecuted but was listed on the Schengen Information System, an EU-wide database which includes details of potential suspects.

The married father-of-two, who worked for London Underground, could be seen in the programme arguing with police officers in the street, after displaying a flag used by so-called Islamic State in a London park. Two people in Barking, east London, had also raised concerns about Butt and had called a hotline to warn about him. Redouane’ claimed to be a Moroccan-Libyan. He married a British woman, 38-year-old Charisse O’Leary, in Dublin in 2012.

His ex-wife said she was “deeply shocked, saddened and numbed” by his actions.