At least 29 people died when a fire erupted at an Istanbul nightclub undergoing renovations, the Istanbul Governor’s Office said on Tuesday. One person is being treated in hospital for serious injuries, the office said. Investigations continue into the cause of the fire. The fire burned through the 16-storey building in the Beşiktaş district, on the city’s European side. The office said the fire broke out around midday Tuesday on the building’s lower floors, where the Masquerade nightclub is located. Images showed the burned wall of the building. The exact cause was unclear, but the fire could…