CHICAGO (STMW) — A man wearing a motorcycle helmet and brandishing a handgun is believed to have robbed two separate bank branches — one on the Southwest Side and one in south suburban Oak Lawn — since Thursday.

The robberies were at a Chase Bank branch at 5705 W. 95th St. in Oak Lawn on Thursday and a Citibank branch at 5674 S. Archer Ave. in Chicago on Friday, according to the FBI.

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The robber, who in at least one of the robberies was wearing a motorcycle helmet with a visor that obscured his face, was described as a white male, 5-foot-8 to 5-foot-9, wearing white gym shoes. His hair was “colored” and his eye color was unknown. He had a black handgun.

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There have now been at least 100 bank robberies in the Chicago area this year, according to the FBI. In 2010, there were a total of 181 bank robberies in the Chicago area.

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(Source: Sun-Times Media Wire © Chicago Sun-Times 2010. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)