Officials don't know if the two robberies are connected at all. But there are a lot of security cameras both inside and outside that could help the investigation.
RELATED: Some shoppers question safety after mugging at SF mall
Westfield security is working with San Francisco police after two customers there were robbed and one beaten just before 8:30 p.m. on Monday.
Officials say they were on the fourth floor working on their laptops when one suspect distracted them while another grabbed a laptop and took off.
"The two victims ran after the suspect and then the other victim noticed that another suspect came up and took his laptop and cellphone that had been left on the table," said SFPD Officer Giselle Talkoff.
Talkoff says in all there were five teenagers muggers and one of the victims was punched in the face.
2nd robbery reported this month at the Westfield Mall in San Francisco. A couple's laptops stolen..one victim beaten pic.twitter.com/B6P0CbbEb7— carolyn tyler (@ctylerabc7) August 30, 2016
In a statement, Westfield management said the "recent incident involving several youths is not acceptable" and that "significant resources continue to be devoted to security arrangements."
Earlier this month a man was attacked and robbed in a restroom there by at least three men.
And just two days before that, a man's body was found in a mall stairwell in what is now being called a suspicious death.
Police say because this is a busy area, it's easy for criminals to target shoppers. It's a concern for some we talked to on Tuesday.
WATCH VIDEO: Girlfriend of man found dead at SF mall speaks out
"It's awful that you have to be on guard constantly when you have something in your possession," said one shopper.
Another shopper, Robert Evans, says he has nothing for anyone to take.
"I think some of them think I'm going to be robbing as opposed to being robbed, to be honest, so I don't worry about it," he said.
If you have any information about either robbery police want to hear from you.