A BMO Harris Bank branch was reported robbed Friday in northwest suburban South Barrington and the FBI said the suspect may be armed and dangerous.

About 3 p.m., the suspect entered the branch at 40 S. Barrington Rd. and committed a non-takeover bank robbery, according to the FBI.

The robber was described as a white man in his mid-30s, 5-foot-10 with a thin build, light complexion, facial acne, patchy facial hair, and “dirty unkept hair,” according to the FBI. He wore a  dark blue baseball hat, silver-framed glasses, white- or tan-colored plaid short-sleeved shirt, jeans and white sneakers. He carried a large, tan-colored shoulder bag.

The FBI is offering a reward of up to $1,000 for information leading to the arrest of the suspect, but warned he should be considered armed and dangerous.

Anyone with information should call (312) 421-6700 or submit a tip online at tips.fbi.gov.