A 58-year-old woman was violently robbed in the early hours of Jan. 6 at the intersection of Columbus and Chestnut streets in North Beach.

Four male teenagers approached the woman shortly after midnight as she was standing near the intersection. They pushed her to the ground, stole her purse and phone, and fled the scene by car.

SFPD officers later discovered the car based on its description and arrested the four suspects, ages 16, 18, 18 and 19.