The death toll from a fire that erupted at an Istanbul nightclub undergoing renovations has risen to at least 29, Turkish state news agency Anadolu reports, citing local authorities. One person is being treated in hospital for serious injuries, Anadolu reported. The fire burned through the 16-storey building in the Beşiktaş district, on the city’s European side. Anadolu reported the Istanbul’s governor’s office said the fire broke out around midday Tuesday on the building’s lower floors, where the nightclub is located. The exact cause was unclear, but the fire could have started during the ong…