LOS ANGELES (AP) — A 23-year-old man has pleaded guilty to throwing a Molotov cocktail at Los Angeles County sheriff’s deputies during protests against immigration raids across the region last spring.

Emiliano Garduno Galvez, a Mexican national who authorities say is in the U.S. illegally, pleaded guilty Wednesday to possessing an unregistered destructive device and civil disorder connected to his actions June 7 in Paramount, a city near LA. He faces up to 15 years in prison when he's sentenced Jan. 30.

Sheriff's deputies responded to a large protest that day at which demonstrators were throwing rocks and other items outside a Home Depot where U.S. Border Patrol agents had gathered.

According to the plea agreement obtained by the Los Angeles Times, Galvez admitted that he went behind a wall, lit the Molotov cocktail and then hurled it toward where he had seen the deputies.

The incendiary device landed in a grassy area near the foot of a protester and about 15 feet (4.5 meters) from the deputies, according to the plea agreement. Galvez said he then ran away.

Galvez threw the device “intending to obstruct, interfere with, and impede the LASD deputies who were lawfully engaged in performance of official duties,” according to the agreement.

Many demonstrations against the June immigration crackdown were peaceful, with marchers chanting slogans and carrying signs, though others led to clashes with police, hundreds of arrests and the use of chemical irritants to disperse crowds.