Berlin officials have condemned riots by leftist protesters in the German capital that left scores of police officers injured over the weekend.

City interior minister Frank Henkel on Monday called the riots in the Friedrichshain district, which followed police operations last month at buildings taken over by squatters, a "leftist orgy of violence."

Top city officials were getting together for a meeting on how to react to Saturday night's outburst of violence, which police called "the most aggressive and violent protests in the last five years."

The issue comes amid political tension before September regional elections.

German police said two people were still in custody Monday for violating the public peace and 100 protesters were under investigation.