Greek police are treating a gun attack on the Athens offices of a leading political party as a terrorist attack.
Several gunshots were fired on Monday afternoon in the Exarcheia district of the Greek capital, very close to the headquarters of the center-left PASOK party.
According to eyewitnesses, two hooded assailants on a motorcycle opened fire on riot police who were guarding the building.
No injuries or any serious damage was reported and no organization has claimed responsibility so far.
Greek forensics officers are examining residue taken from the scene.
The attack took place only an hour before a television debate between presidential candidates for a new social-democratic party to be formed after internal elections to take place next Sunday. PASOK will be included in that party.
PASOK president Fofi Gennimata told local media: "It is a murderous act, it is not a simple matter. There is criminal negligence on the security of PASOK offices and the citizens of the area."
Some candidates in the debate demanded that the resignation of Citizen Protection Minister Nikos Toskas.
All parties have condemned the attack and Prime Minister Alexis Tspiras's office described the incident as a "provocation".
Although the offices of PASOK are often the target of anarchists throwing Molotov cocktails and rocks, gun attacks are uncommon.
However, on Jan. 10 this year, two policemen were injured by what the anti-terrorist department now calls "a similar attack".
