The PNC bank branch at 25350 Detroit Rd. was robbed at gunpoint at 11:05 a.m. on Thursday, police reported.
Police said a man showed a gun in the bank. He was last seen running north into the Interstate 90 area. He was described as 6 feet tall, thin build, wore a navy blue hoodie and sweatpants, and had a blue bandana over his lower face.
The suspect was also wearing brown boots and gloves, according to police. He was carrying a semi-automatic pistol and a light blue shopping bag.
No one was hurt, police reported.
Officers searched the area to the northeast of the Columbia Road and Detroit Road intersection with a K-9.
PNC is offering a $10,000 reward for information leading to the identification, arrest and conviction of the suspect involved.
Anyone with information should contact Westlake police at 440-871-3311 or the Cleveland Federal Bureau of Investigation at 216-522-1400.
