The trio are accused of participating in a £1million scam using stolen details to get loans, cars and launder funds.
29-year-old Yasser was arrested at a west London address as his elder brother Uthman Mustafa Kamel, 31, was held nearby. Tito Ibn Sheikh, 33, once known as Hamza Mustafa Kamel, was later arrested in north London. Three others, including a husband and wife, were also held.
The statement added that all six people were arrested at addresses in north, east and west London at 6.00am on Tuesday, 17 December for fraud and money laundering offences. The offences are not terrorism related.
Officers from the Metropolitan Police’s Specialist Operations carried out the intelligence-led operation. Searches on seven addresses have since concluded.
According to the Sun, the police believe that a bank worker assisted with the alleged fraud. The six people arrested have been released on bail as inquiries continue.
Abu Hamza, who is serving life without parole in the US for supporting terrorism, fathered Yasser, Uthman and Tito with his second wife Najat Mustafa.
It is thought the 61-year-old travelled Egypt, Afghanistan and Pakistan where he developed extremist views and, at some point, lost both hands and an eye.
In 1998, Hamza helped organise hostage-taking 16 tourists in Yemen. Three Britons and an Australian were killed in the rescue mission.
Hamza was suspended by Charity Commission from his position as imam at Finsbury Park Mosque after speaking out in support of Osama bin Laden following the September 11 attacks.
In 2006, Hamza was imprisoned for seven years following a trial at the Old Bailey, where he was found guilty of 11 out of 15 charges.
He was extradited to the US in October 2012 and found guilty of 11 terrorism charges in May 2014. Sentenced to life without parole in January 2015, Hamza currently resides in a ‘supermax’ correctional facility ADX Florence, Colorado.