Police arrested three people for the attempted murder of an officer as the violent riots swept through London.

The suspects were detained and arrested in the Brent area of north London early on Tuesday after a police officer was struck by a car and rushed to hospital.

The officer and a colleague, who suffered minor injuries, had stopped a number of cars in the belief that the occupants had been involved in the looting of a nearby electrical store.

A police statement described how the officer was seriously hurt as one of the cars drove away from the scene. The vehicle was later stopped and the three people inside were arrested.

The London riots, which began in Tottenham, North London following the police shooting of Mark Duggan, 29 on Thursday, have entered their third day.

Disorder was reported from Croydon, Clapham, Hackney, Camden, Lewisham, Peckham, Newham, East Ham, Plaistow, Woolwich, Ealing and Colliers Wood.

For the first time last night, it also spread into other cities, including Birmingham, Manchester, Nottingham and Liverpool.

In total 69 people have been charged and two people have been cautioned over the riots.