2020 ended with some vandalism in Philadelphia. A group of people dressed in black vandalized at least two federal buildings in Center City on New Year’s Eve, and police said Friday they recovered Molotov cocktails and other suspicious devices as they arrested seven of them.

Officers spotted about 50 people, all in black, around 8:30 p.m. Thursday at the historic U.S. Customs House, police said.

And a 25-year-old man was seen throwing a brick through the windows of a federal building and courthouse shortly before 9 p.m., police said. He fled with a 24-year-old man and two 23-year-old women, all of whom were arrested.

Read more: CBS Philadelphia