London: Britain's Home Secretary Amber Rudd has complained to her US counterpart over the leak of the identity of the Manchester suicide bomber to the American media.

Mrs Rudd took the extraordinary step of making the UK government's frustration with the Americans public on Wednesday as counter-terror investigators worked to identify possible accomplices of 22-year old Salman Abedi.

On Wednesday morning, local time, police in Manchester arrested three people in the city's south. They had already arrested a 23-year-old man in relation to the attack. US media identified that man as Abedi's brother, citing "US officials".

As was the case with the Westminster attack in April, British press held off reporting the attacker's name - even though they knew it - to avoid endangering the investigation or tipping off any further suspects. But on Tuesday, US networks CBS and NBC named the perpetrator hours before Greater Manchester police confirmed his identity.