A police handout photo shows items seized during raids on several properties linked to the suspects.
The Greek Police on Friday said it has netted a gang of thieves who are believed to be responsible for at least two murders.
A large-scale operation in the Attica region has led so far to the arrest of seven suspects – six Albanian nationals aged between 28 and 43, and one Greek, also 43 – police said.
A 27-year-old Albanian man who is currently in prison for robbery is also believed to be a member of the gang.
The investigation has revealed evidence suggesting the gang may have been behind the killing of a 53-year-old man in Elefsina, southwest of Athens, in March 2015, and a 75-year-old woman in Aspropyrgos in the same area, in October.
Both victims are believed to have been killed during the course of a robbery at their homes.