London, Jun 26 (IANS): Six police officers were injured and four people arrested in a protest here over the death of a man following a traffic stop, the media reported.

On Sunday night, bricks were thrown and fires lit outside the Stratford bus station and Forest Gate police station in London, reports the BBC.

Protesters allege Edir Frederico Da Costa, 25, was "brutally beaten" by Met Police officers earlier this month.

He died six days later on June 21.

The Independent Police Complaints Commission said a preliminary post-mortem examination, carried out on Thursday, indicated there were no spinal injuries caused by police.

The IPCC is investigating the Met's treatment of Da Costa, the BBC reported.

Earlier on Sunday evening, Borough Commander Ian Larnder stood in the middle of a group of protesters trying to answer their questions and calm tensions.

One protester rode his motorbike up to the police line and revved his engine in front of officers. Another motorcyclist turned his bike towards the officers and span his wheels so smoke blew towards them.

Firefighters hosed out a fire which had been started in a bin in Richmond Road. Bins were also set alight near a McDonald's in Romford Road.

Family campaigners said the violence was not coming from them, and insisted it had been set up as a peaceful march.