CENTREVILLE, Va. (AP) — FBI agents arrested a woman Tuesday who was suspected of robbing four banks in suburban Virginia while appearing to be talking on a cell phone.

Candice R. Martinez, 19, was arrested just before 4 a.m. at a home in nearby Centreville, Va., after an FBI agent spotted a car nearby with license plates they had been searching for.

Martinez is suspected of robbing four Wachovia Bank branches between Oct. 12 and Nov. 4. Security cameras filmed the suspect walking up to tellers and handing them a note demanding cash — all while appearing to be chatting on her cell phone.

Investigators weren't sure whether Martinez was actually talking to someone while she demanded cash or if it was just a cover, Weierman said.