A shootout at a nightclub in Albania has left four people dead, and a lawmaker whose son was detained as a suspect in the case has resigned.

The violence at the Ante Grand club in Tirana occurred early Tuesday, killing a 60-year-old Italian man and three Albanian men, police said. Two other men were hospitalized with injuries.

The shootout followed a quarrel at the club, which is located on the ground floor of an apartment block less than 100 meters (yards) from the U.S. Embassy, police said.

Three suspects were detained, including Konstandin Xhuvani, 25.

Soon afterward, his mother, Luiza Xhuvani, 50, an Albanian film star and governing Socialist party lawmaker, announced her resignation from Parliament at a news conference held with Prime Minister Edi Rama.