LOS ANGELES (AP) — Federal immigration authorities carried out enforcement activities at businesses across Los Angeles on Friday, prompting clashes outside at least one location as authorities threw flash bangs to try to disperse a crowd that had gathered in protest.

Immigration advocates confirmed at least 45 people were arrested without warrants across seven locations, including two Home Depots, a store in the fashion district and a doughnut shop, said Angelica Salas, executive director for the Coalition of Humane Immigrant Rights, or CHIRLA, at an afternoon press conference denouncing the activity.

Federal immigration authorities have been ramping up arrests across the country to fulfill President Donald Trump’s promise of mass deportations. Todd Lyons, the head of U.S. Immigration and Customs Enforcement, defended his tactics earlier this week against criticism that authorities are being too heavy-handed. He has said ICE is averaging about 1,600 arrests per day and that the agency has arrested “dangerous criminals.”

Protests recently broke out after an immigration action at a restaurant in San Diego and in Minneapolis when federal officials in tactical gear showed up in a Latino neighborhood for an operation they said was about a criminal case, not immigration.