The former offices of luxury fashion house 'Zeus & Dione' founded by the wife of Greece’s PM, were targeted in an attack on Wednesday evening
The explosion caused by gas canisters blackened the entrance of the building in Psyrri.
No one was injured during the attack.
The brand used to be co-run by Mareva Grabowski Mitsotakis, until she resigned from the company board in 2020.
The same building was attacked three years ago, an act claimed by the "Partnership of Unrepentant Anarchists".
Government officials condemned the attack.
The Prime Minister’s office described the attackers as “brazen thugs” and attributed the incident to “systematic targeting.”
"The the government will continue without wavering on its path to establishing citizens' sense of security, in respect of the state of law," the statement added.
Authorities are conducting an investigation into the attack.