EL CAJON (CNS) - Police and the FBI sought the public's help today in catching a woman who robbed a bank in El Cajon.

The holdup at a Bank of the West at 1234 E. Main St. occurred about 3:40 p.m. Friday, when the woman gave a demand note to a teller, according to FBI Special Agent Darrell Foxworth.

The woman said she had a gun but did not show one.

The teller handed over an undisclosed sum, and the woman fled, Foxworth said.

The robber was described as a white, in her 20s, about 5 feet 6 inches and 135 pounds, with blond or brown hair. She was wearing a dark, hooded sweatshirt and black pants, authorities said.