The suspects were captured on surveillance video. (KTLA-TV) |
Authorities have released surveillance video of the incident, which happened at 11 p.m. on Dec. 28 in the 12000 block of Knott Street.
The clerk asked the suspects for ID, and they started punching him.
A customer tried to help, but he was also attacked.
Neither the clerk nor the Good Samaritan was seriously hurt.
Police say the first suspect, a 16-year old from Westminster, turned himself in because of all the media coverage.
The second alleged robber, a 17-year-old, was arrested at a Westminster school on Tuesday.
Both are being held at Orange County Juvenile Hall.
Their names have not been released.
Anyone with information is asked to call Garden Grove police at (714) 741-5704.

