LOS ANGELES — (AP) — The Los Angeles mayor has asked for National Guard troops as violence continues in the nation's second-largest city.

Mayor Eric Garcetti says Saturday evening he asked Gov. Gavin Newsom for 500 to 700 members of the Guard. The mayor imposed a curfew on the city after crowds torched police cars and burglarized stores.Everyone was ordered to be off the streets until 5:30 a.m. Sunday.

Clashes between protesters and lines of police officers after an initially peaceful gathering. More than 500 people were arrested during clashes downtown Friday night. The new violence is centered about 6 miles to the west.