A small explosive device detonated outside a building housing Eurobank offices in central Athens on Wednesday, damaging its entrance and shattering windows, police said.
There were no injuries, police said.
Eurobank is Greece's third-largest lender by assets.
Small-scale attacks on businesses, police and politicians are frequent in Greece, which has a long history of political violence and is still struggling to emerge from a crippling debt crisis.
"The explosion damaged the entrance and smashed some windows," a police official said, adding that some nearby buildings were also slightly damaged.
Police had cordoned off most streets in the surrounding area following a warning call to a local news website. The explosion, which occurred at 10.38 p.m. local time, was loud and was heard in central Athens. [Reuters]