A small bomb exploded on Friday outside a building where a governing party lawmaker lives in Athens, causing minor damage but no injuries, police said.
A police statement said the device exploded around 2 pm (1200 GMT) at the entrance to Mimis Androulakis' apartment building in the eastern Kareas suburb. It was unclear whether the lawmaker was in his second-floor flat at the time.
No group immediately claimed responsibility for the attack, which involved a bomb with a timer and followed a warning call to police. Greece's new Socialist government has pledged to crack down on far-left and anarchist militants who oppose government economic and social policies and have stepped up bombing and shooting attacks on police and politicians over the past year.
The spike in violence followed the fatal police shooting of a teenager in Athens last December, which sparked widespread rioting in many Greek cities.
Last month, a small bomb placed in a saucepan damaged the entrance to the apartment building where a prominent opposition conservative lawmaker lives. A small far-left group called Conspiracy Nuclei of Fire claimed responsibility for the attack, which caused no casualties.
On October 27, six police officers were wounded when gunmen on a motorcycle opened fire with automatic weapons on a suburban precinct in Athens.