Officers responded to a report of an armed robbery in the 600 block of Spring Street at about 8 p.m.
Two teen boys, ages 15 and 16, were standing on Spring Street when two suspects approached them. One wore a black mask and the other had a black bandana over his face. Both were wearing black hoodies pulled over their heads.
One suspect pulled out a handgun and ordered both victims to the ground, police said. The pair then stole items from the victims' pockets, along with their shoes and a bicycle.
The armed suspect pistol-whipped one of the victims, causing a small cut on his head, police said.
No other injuries were reported.
One of the suspects, a 17-year-old boy, was apprehended in the 400 block of Chestnut Street with the stolen bike.
The second suspect is still outstanding.
Anyone with information about this robbery or two others that occurred over the weekend on Spring Street and Edgewood Road is urged to contact Redwood City police at (650) 780-7100.