Shots were fired early on Monday near the offices of main Greek ruling party New Democracy in Athens, police said, after a recent wave of arson attacks against political offices.
Two men on a motorcycle fired a gun in the air around 2:30 am (0030 GMT), police said. No one was injured.
Police forensic teams collected nine Kalashnikov assault rifle casings from the scene, reports said.
There was no visible damage to the building but a bullet was found in the office of Prime Minister Antonis Samaras, government spokesman Simos Kedikoglou said.
“A symbolic bullet for the prime minister, this is unheard of,” Kedikoglou told state television NET.
“We will not let them terrorise us,” he said. “The government will do what is required to protect democracy.”
Early on Saturday, two district offices belonging to the conservative New Democracy party were hit by an arson attack, while an office of the socialist party Pasok, a partner in the ruling coalition, had its front windows smashed.
This came after similar arson attacks against the homes of five Greek journalists early Friday that caused material damage but no casualties.
On Sunday, the home of the brother of the government spokesman was also targetted in an arson attack.
The burst of violence is believed to be linked to recent police operations against squatters in public buildings that has sparked tension with the main opposition radical leftist party Syriza.
A large protest over the issue was held in Athens over the weekend.
The coalition government has introduced additional austerity measures in the recession-weary nation to secure continued access to EU-IMF bailout loans.
Last week it bolstered taxation legislation, and additional reforms are due to be voted in parliament late Monday.
Friday’s attacks were claimed by two previously unknown groups — Fighting Minority and Circles of Offenders/Nuclei of Lawlessness Lovers — who described the media as “the official representation of the system.”
Shots fired near Greek ruling party offices: police
