As in London now, the concern in LA was that the violence spiralled to the point where the original trigger of rioting became irrelevant.

The violence in the city spiralled in the summer of 1932.

Since the new Iraqi government was installed in May, sectarian violence has spiraled out of control in many parts of Baghdad.

By 1934 violence was spiralling out of control.

These were but small victories in a situation in which communal violence used by politicians to serve their own ends spiraled out of control.

In the absence of any concrete government initiatives, violence in the Punjab spiralled during 1990.

It then appeared paralyzed as the violence spiraled into the worst civil unrest that France has faced in nearly 40 years.

He added that violence had been allowed to make sense "inside a pattern of violence allowed many years before" that sent "violence spiraling higher."

Leaders of the police and British Army are finding it increasingly difficult to persuade a frightened public that violence is not spiraling out of control.

For decades, the violence has been spiralling out of control in an unending vicious circle.