Dimitris Koufodinas

Main opposition leader Kyriakos Mitsotakis lambasted the government on Monday over the new attack by anarchist group Rouvikonas at the Citizen Protection Ministry earlier in the day, saying this is considered normal by Prime Minister Alexis Tsipras.

About 20 Rouvikonas members attempted to enter the ministry building but were prevented by the guards at the main entrance.

Twenty members of anarchist group Rouvikonas attempted to barge into the Citizens Protection Ministry on Monday morning but were prevented by the ministry's guards.

Police said in a press release the suspects were stopped at the outer perimeter of the building, on Kanellopoulou avenue, detained and transferred at the Attica Security Directorate. 

The state security agency is carrying out an investigation into Thursday's attack by anti-establishment activists on the downtown Athens office of conservative lawmaker Militiadis Varvitsiotis.

Greece's conservative opposition hammered the leftist-led government on Thursday after an attack by self-styled anarchists on the office of New Democracy MP Miltiadis Varvitsiotis.

"What more, one wonders, needs to happen for the government to realize its obvious responsibilities?" the party said in a statement.

Dimitris Koufodinas, the jailed former hitman of the now defunct November 17 urban terrorist group, who Tuesday entered the sixth day of a hunger strike to demand regular furloughs, refused to repent for his acts in comments published in a left-leaning newspaper.

"In any case the granting of furloughs does not require an expression of repentance," he said.

Suspected members of the anarchist group Rouvikonas on Monday burst into the offices of the General Secretariat for Trade in Kaningos Square in central Athens.

According to Skai television, the anarchists were calling for the release of convicted November 17 hitman Dimitris Koufodinas who started a hunger strike last Wednesday.

Dimitris Koufodinas, a jailed former member of the now defunct November 17 urban terror group, was on hunger strike for a second day Thursday.

Dimitris Koufodinas, a convicted terrorist and member of Greece's most notorious terrorist group, 17 November, has returned to prison after a 48-hour furlough, his second overall.

Koufodinas, 60, arrived at Athens's Korydallos prison about 30 minutes before the 48 hours expired, accompanied by his wife and son. He greeted the waiting media but made no statement.

November 17 hitman Dimitris Koufodinas, who is serving 11 life sentences for his role in the extreme-left terrorist group, began a two-day furlough from prison on Friday, his second in three months.

He was greeted outside Athens's maximum-security Korydallos Prison on Friday morning by his partner, his son and a group of applauding supporters and friends.

UK ambassador to Greece Kate Smith voiced her strong opposition to the second furlough granted on Friday to November 17 hitman Dimitris Koufodinas.

In a message on Twitter the British diplomat wrote: "It's extremely disheartening to see an unrepentant convicted terrorist coming out of prison again."