At least 11 people, including eight police officers, were injured during a protest in northern London over last week's fatal shooting of a young man by police, health officials said on Sunday.
Nine had been taken to hospital, including eight injured police officers, at least one of them with head injuries.
Some 300 people gathered outside a police station in Tottenham on Saturday night to demand "justice" after 29-year-old private taxi driver Mark Duggan, a father of four, was killed in Thursday's shootout with police.
Protesters threw petrol bombs at police officers, who have cordoned off the area. Two police cars, a double decker bus and nearby buildings have been set on fire.
Firefighters have been tackling the flames while police have been trying to prevent shops in the area from being looted.
Witnesses have described the situation as "chaos."
