Riot police are being deployed throughout the city to prevent any trouble.

防暴警察正部署至全城以防止骚乱。

《柯林斯英汉双解大词典》

Sporadic looting broke out across the city centre, with gangs playing cat and mouse with riot police.

市中心多处发生零星的抢劫，团伙们与防暴警察玩起了猫捉老鼠的游戏。

youdao

Despite riot police positioned across the city, gangs of youths on mountain bikes, their faces masked, prowled the streets.

尽管防暴警察在城中各处设岗，但骑着山地自行车、戴着面罩的年轻人团伙仍潜行在街道上。

youdao

The riot spread across the city.

VOA: special.2009.10.29

Police adopted similar tactics early Sunday in Lahore, surrounding the home of opposition leader Nawaz Sharif and deploying scores of officers in riot gear throughout the city.

VOA: standard.2009.03.15

On news of the ban, a riot in one city left ten people dead.

ECONOMIST: China

The turmoil in Port Said, located on the Mediterranean coast at the mouth of the Suez Canal, started on Jan. 26, after a court issued death sentences against 21 defendants mostly Port Said residents for involvement in a deadly soccer riot in the city in February 2012 that killed 74 people, mostly fans of a rival Cairo soccer club, Al-Ahly.

NPR: Egypt's Leader Mulls Army Takeover Of Restive City

They were "provocateurs" who forced taxpayers to spend millions of shekels to deploy 2, 500 policemen armed with riot gear to the city.

CENTERFORSECURITYPOLICY: Umm el-Fahm and liberal democracy