Already, there have been riots and protests in some North African countries.

There have been riots at the detention centre, and there have been deaths.

There had been riots, and British troops fired on the crowd.

There had been riots in the East and discontent and much resentment were rife.

By Saint Karel, no wonder there have been riots!

There've been riots all over the city to-night.

There had been riots in Brixton, spending cuts to fund tax cuts, a lot of strikes.

There had been riots in the town and a troop of cavalry was quartered in the Guildhall.

There had been riots demanding their return.

There would have been riots.'

There had just been riots in the territory, fomented by "leftists" egged on by China against British rule.