Greek journalist Sokratis Giolias is shown Jan. 30, 2008. He was shot dead in a pre-dawn attack outside his home on July 19. ((ICON/Associated Press))

A militant group that calls itself the Sect of Revolutionaries has claimed responsibility for gunning down a journalist outside his home in Athens last week, police said.

Sokratis Giolias was shot more than a dozen times outside his home on July 19. The 37-year-old reporter headed an Athens radio station and was linked to a popular news blog that often reported on financial and political scandals.

According to colleagues, he had been about to publish the results of an investigation into corruption.

Police had already matched bullets from handguns used in the attack to the Greek militant group, which had previously used the weapons in the killing of an anti-terrorist police officer and a shooting outside a private TV station.

Authorities said the Athens daily Ta Nea received a statement from the group Tuesday, claiming responsibility for Giolias's killing. Details of the statement were not available, but the newspaper said it included threats against well-known Greek journalists and publishers.

"Threats were also made against police, public prosecutors, prison officials, prison directors and social workers working in prisons," the newspaper said on its website.

The militant group emerged after Greece was hit by widespread rioting in December 2008, sparked by the police's fatal shooting of a teenage boy.

Since the riots, Greek authorities have battled increasingly deadly attacks by militant groups. Last month, a letter bomb exploded inside the Civil Protection Ministry — one of Greece's most heavily guarded buildings — killing a close aide of the minister.

The Sect of Revolutionaries has made threats against media targets in the past and last year attacked the headquarters of private broadcaster Alter TV.