A man said he was walking home from work in the Mission district Monday night when teenagers beat him up and stole his cash, police said.

Just before 10 p.m., police said, officers responded to the 3100 block of 24th Street on a report of robbery. The victim, who suffered a swollen cheek, said he saw three boys ages 15 or 16 hanging out on the street corner. To avoid them, police said, he walked into a store. But they reportedly attacked him anyway, taking money out of his pocket before fleeing.