PITTSBURGH — At least six more buildings received bomb threats Thursday at the University of Pittsburgh, as students and their parents continue to press authorities to solve the case.

No bombs have been found and no one has been injured since the threats began more than two months ago.

The FBI seized computers and related equipment on Wednesday evening from a couple who had been questioned in the case earlier, according to a report.

Katherine Anne McCloskey and Seamus Johnston have condemned the threats and said they didn’t have anything to do with them. They also say the FBI is harassing them. McCloskey was born a man but lives as a woman.

School officials haven’t issued any updates on the threats since last week.