A woman is comforted by her friend as she breaks down in tears during a minutes silence near the scene of Saturday's terrorist attack, June 6, 2017, in London.

Members of the public observe a minute's silence for the victims of the London Bridge terror attacks on London Bridge, June 6, 2017.

A vigil is held for the victims of the London Bridge terror attack in Potters Fields Park, June 5, 2017, in London.

People bow their heads along with London Mayor Sadiq Khan during a vigil at Potters Fields Park in London, June 5, 2017, to commemorate the victims of the terror attack on London Bridge.

Police forensic officers work on the London Bridge, June 4, 2017, as police continue their investigations following the June 3 terror attack in London.

Members of the public view the scene after police officers raided a property in East Ham, June 4, 2017 in London, following the attack on the London Bridge.

Forensic investigators work near Borough Market in London on June 4, 2017, following the June 3 terror attack on the London Bridge.

People receive medical attention on Thrale Street near London Bridge following a terrorist incident, June 3, 2017.

Armed police officers respond to an incident on London Bridge in London, Saturday night, June 3, 2017.

People leave the area with their hands up after an incident near London Bridge in London, June 4, 2017.

Armed police stand over two suspects shot at the scene of a terror attack outside Borough Market in central London, June 3, 2017.

A victim is treated near London Bridge after a vehicle struck pedestrians in an apparant attack, June 3, 2017 in London.

Police and members of the emergency services attend to victims after an attack on the London Bridge in central London, June 3, 2017.

People flee the area near London Bridge after reports of an incident involving a vehicle and pedestrians, June 3, 2017 in London.

Police officers and members of the emergency services attend to a person injured in an apparent terror attack on London Bridge, June 3, 2017 in London.