Three firebombs have exploded at different locations in central Athens, with one wounding a woman.
Police said in a statement today that all devices consisted of camping gas canisters.
One exploded at about 8am local time today in the fifth floor corridor of an apartment building in central Athens, near the political office of the country's Transparency general secretary, wounding a woman who had just emerged from her apartment.
The woman was transferred to a hospital for treatment of slight burns.
The other devices detonated several hours earlier, one outside a building housing the Foundation for Economic and Industrial Research and one outside a branch of the Environment, Energy and Climate Change Ministry.
Firebomb attacks against government offices, banks or symbols of wealth are common in Greece.