Greek police believe the perpetrators of the shooting attack on the Israeli embassy in Athens last week was the Popular Fighters Group, a local anti-establishment terrorist group, the Greek daily Kathimerini reported on Saturday.

Though no group has so far claimed responsibility for the early morning attack Friday on the Israeli embassy, forensic tests show the same AK-47 was used as in a 2013 attack on the German ambassador's residence, which was claimed by the Popular Fighters Group, police said.

Police officers told Kathimerini that contrary to previous reports, the four perpetrators of the attack on the embassy arrived at the scene in a stolen van, not a car or motorcycles.

The Popular Fighters Group, also referred to as the Group of Popular Rebels, was formed in response to the Greek government-debt crisis and mostly attacks Greek government institutions and German organizations. In January 2013, the group attacked the headquarters of the governing New Democracy party in Athens. In April 2014, the group is believed to have been behind a car bombing outside the Bank of Greece headquarters in Athens.

Nikos Maziotios, the man Greek police believe formed the Popular Fighters Group, is currently serving a 50-year prison sentence after his arrest in the summer. But police say that he may have took part in organizing anarchists who were not previously known to the police to carry out the attacks.

If the incident in fact turns out to be a terrorist attack against the embassy, this would be the first serious attack against an Israeli embassy since the terror attack in New Delhi, India in 2012, in which the wife of an embassy staffer was injured. Iranian agents were apparently behind that attack.