Arsonists targeted the homes of five Greek journalists in Athens in the early hours on Friday, causing damage but no injuries, radio reports said.
Police said the unknown assailants planted devices consisting of gas canisters at the entrance of their homes in various parts of the city. No one was injured from the explosions, which caused minor damages.
Two of the journalists work for private television stations, one for the Greek state news agency and two more for state radio and television ERT.
Authorities believe that left-wing anarchists are behind the attacks.