London's Metropolitan Police Service has arrested 768 people in connection with violence, disorder and looting, the department reported early Wednesday.
In all, 111 police officers and five police dogs have been reported injured, according to a police statement Tuesday.
"It's just mindless violence."
The man's family and friends, who blamed police for the death, had gathered peacefully Saturday outside the Tottenham police station to protest.
Rioting erupted shortly afterward, and a police officer was killed.
Britain's riots began Saturday when an initially peaceful protest over a police shooting in London's Tottenham neighborhood turned violent. Police deployed extra forces on the streets of London to prevent a fourth night of unrest.