After a weekend of violent uprisings across Britain, set off by a deadly stabbing rampage and an anti-immigrant disinformation campaign that followed it, tensions are high from the streets to government leaders’ offices.

Here is what we know as the country enters a new week of uncertainty.

Protesters over the weekend took to the streets of a dozen cities across the United Kingdom, most of them in England. Trouble broke out from Aldershot in the south to Sunderland in the north and Liverpool in the west. Belfast, in Northern Ireland, was also drawn into the fray.

In some cases, the protesters were merely unruly, but in others the violence was far more pronounced.

On Sunday, rioters set upon a hotel that has housed asylum seekers in the town of Rotherham, in northern England, breaking windows before surging inside as the police struggled to control them. It remained unclear whether asylum seekers were still staying at the hotel and no guests were injured in the melee, police said.

In Middlesbrough, a group of rioters, some masked, hurled bottles and rocks at officers. Cars were set on fire, and at least nine people were arrested. On Saturday, a library and a food bank were set alight in Liverpool as groups damaged and looted businesses, and in Hull, fires were set and storefronts smashed in the city center.

Nearly 150 people were arrested over the weekend, national police representatives said, and dozens of police suffered injuries, including some that required trips to the hospital.