Just last month, several businesses were hit in Santa Clarita, and police are trying to determine if all the incidents are related.
Police believe the damage may have come from an air pistol.
Four of the attacks happened between 9 p.m. to 11 p.m. Monday in Sherman Oaks and Van Nuys, including a furniture store and a Chinese restaurant.
Earlier in the afternoon, six businesses were attacked, including three on Van Nuys Boulevard in Pacoima, one on Foothill Boulevard in Lakeview Terrace, and one on Lankershim Boulevard in Sun Valley.
Police said the businesses were not robbed.
Anyone with information was asked to contact the Los Angeles Police Department at (877) LAPD-24-7.