Nearly 400 people have been arrested after six days of riots in parts of England and Northern Ireland, police say.
On Monday evening police were attacked in Plymouth as they attempted to keep rival protesters apart, petrol bombs were thrown at officers in Belfast and police dealt with unrest in the east of Birmingham.
Over the past week dozens of police officers were injured and shops, cars and homes damaged in disorder in the UK.
It erupted the night after three children were killed in Southport in a stabbing attack last Monday. This followed false rumours which spread online that a suspect was a Muslim asylum seeker.
Over the weekend the prime minister condemned the riots as “far-right thuggery” and on Monday he vowed to “ramp up” the law to deal with the violence.
In Plymouth, police said on Monday night there had been a “level of violence” shown towards officers and a police van had been damaged.
“We are taking action against individuals who are intent on criminality,” Devon and Cornwall police said.
Supt Russ Dawe added “several” officers had been injured. He said a number of arrests had been made for a “range of public order offences and assaults”.