Romanian Prime Minister Victor Ponta has resigned after some 20,000 people took to the streets to protest over a nightclub fire that killed 32 people. Friday night's blaze in Bucharest started when a band performing at the club set off fireworks inside. Demonstrators called for Mr Ponta to step down, complaining of government corruption and poor safety supervision. More than 100 people are still in hospital and some of them in a critical condition, after suffering burns and poisoning in the fire. Doctors fear the toll could rise.