DISCOVERY BAY — Deputies arrested two more teenagers in connection with a string of strong-armed robberies in the small town last week.

A 14-year-old boy and 16-year-old girl, both from Discovery Bay, were booked into Juvenile Hall in Martinez on Tuesday, Contra Costa sheriff’s spokesman Jimmy Lee said in a news release. Their names are being withheld because of their age.

Last Friday, sheriff’s deputies arrested two 16-year-old boys, one from Discovery Bay and the other from Antioch, in connection with the robberies. They were charged with two counts of robbery and conspiracy, according to the Sheriff’s Office.

A 19-year-old pizza delivery man, two 16-year-old boys and a 14-year-old boy were attacked and robbed in a single 24-hour period last week, Lee said. The attackers took cash, two iPods, several pizzas, a soda and a set of headphones in the robberies, which occurred on Cullen Drive and Lakeshore Circle.

Deputies are still investigating the case and ask anyone with additional information to call Lt. Mike Burton at 925-427-8510 or the Sheriff’s Office at 925-646-2441.

Contact Hannah Dreier at 925-779-7174. Follow her at Twitter.com/hannahdreier