WICHITA -A Topeka store clerk was indicted Wednesday on federal charges of aiding and abetting an armed robbery and carjacking at the store where he worked, U.S. Attorney Barry Grissom said in a news release.

Ahmad Salim Salti, 20, Topeka, Kan., was charged with one count of aiding and abetting armed robbery, one count of aiding and abetting carjacking and one count of aiding and abetting the brandishing of a firearm during the robbery.

The indictment alleged that Salti aided and abetted a Sept. 16, 2014, armed robbery and carjacking at the Low Cost Plus convenience store at 3101 S.E. 6th Avenue in Topeka.

In September, Pattrick J. Towner, 24, Topeka, Kan., was indicted on one count of armed robbery and one count of carjacking. According to court documents, on Sept. 16, 2014, Towner held at gunpoint a technician who was working on the ATM in the Low Cost Plus convenience store. Towner forced the technician to give him the keys to a Ford Freestar van containing cash used for restocking ATMs. Then Towner fled with the van.

If convicted, Salti faces a maximum penalty of 20 years in federal prison and a fine up to $250,000 on the robbery charge, a maximum penalty of 15 years and a fine up to $250,000 on the carjacking charge, and a penalty of not less than seven years and a fine up to $250,000 on the charge of brandishing a firearm. The Topeka Police Department and the FBI investigated. Assistant U.S. Attorney Jared Maag is prosecuting.