PITTSBURGH - The American Civil Liberties Union has filed a revised federal lawsuit against the City of Pittsburgh on behalf of two groups who protested at the G-20 economic summit in September.

The amended complaint, filed late Friday, expands on allegations contained in a September lawsuit. The ACLU contends Mayor Luke Ravenstahl, police and parks officials and others conspired to harass two groups, Seeds of Peace and Three Rivers Climate Convergence.

The group says the city delayed and denied permits to peaceably assemble, and unfairly confiscated some of their equipment, including tents and a bus that runs on biofuels.

The groups want a federal judge to declare their rights were violated and seek unspecified damages. The city has until Jan. 8 to respond. - AP