The reward for information leading to the arrest of the so-called "Grandpa Bandit" is up to $15,000.

The reward for information leading to the arrest of the so-called "Grandpa Bandit" is up to $15,000.

The FBI said today that the man is suspected of robbing six banks — five in the Willamette Valley before Thursday's robbery of the Bank of America branch at the corner of Stevens Street and Crater Lake Avenue in Medford.

The gray-haired bandit did not display a weapon in the Medford robbery, but he did during an October holdup in Salem.

Bank of America has been the victim in five of the six robberies. It is offering most of the reward money.

Before Medford's robbery, the man is suspected of robbing a Key Bank in Salem on Oct. 14 and Bank of Americas in Salem, Sherwood, West Linn and Hillsboro in October and December.

— The Associated Press