Click in the Eyewitness News Story Window above to watch Melissa MacBride's report from downtown Long Beach.
The most recent holdup happened on Monday afternoon. The suspect walked into a closing store on East 8th Street and demanded money from a worker. She gave him the cash, but he cut her several times anyway.
The day before, police say the same man tried to rob a woman outside a store on Elm Avenue, and also stabbed her. He fled without getting any cash.
Both women needed medical help, however their injuries are not major.
Police say the suspect also robbed a woman at a clothing store on Linden Avenue on Saturday; and on Friday night, the suspect also tried to rob a woman walking on Linden Avenue near Broadway. Those two women were not hurt.
Long Beach police want to find this armed robber before he gets even more violent in his next robbery attempt.
"It's very brazen. It's a busy area downtown. So we just need citizens to be alert and aware, as well as people working inside the businesses -- they need to have a phone handy and be ready to call 911," said Long Beach police Services Specialist Lisa Massacani.
The description is vague of the suspect. He's described as being anywhere from 25- to 40-years-old, African-American, with a medium build.
Anyone with information should call the Long Beach Police Department at (562) 570-7260.