A woman was punched and robbed of her purse in front of her children while they were on their way home from trick-or-treating on Halloween night, police said.

At about 10 p.m. on Oct. 31, the 30-year-old woman had just gotten her children into her car near the intersection of Farley Street and Montecito Avenue when a man came from behind, pushed her, punched her in the face and took her purse without saying a word, according Sgt. Dan Vicencio, spokesman for the Mountain View Police Department.

The man, dressed in dark clothing and wearing a white mask, was about 180 to 200 lbs and about 5 feet 8 inches tall, Vicencio said. Neither the robber's approximate age nor his race could be determined, as his face was obscured. The man didn't say anything, and ran away immediately after taking the woman's purse, which contained her wallet.

Police have no suspects in the crime. The only known witnesses are the woman and the children. Anyone with information may call 650-903-6395. All callers may remain anonymous.

Are you receiving Express, our free daily e-mail edition? See a sample and sign-up for Express.