Romanian prime minister Victor Ponta has announced the resignation of his government following huge protests after a nightclub fire killed more than 30 people.

Locked doors at a Buenos Aires nightclub – some padlocked, others tied shut with wire – blocked or slowed the escape of many concert fans who fought to escape a fire that killed 175 people and injured hundreds, survivors and officials said.

A fire swept through a crowded Buenos Aires nightclub during a rock concert, killing at least 174 people and injuring more than 410 as young concertgoers scrambled for the exits, officials said today.

At least 149 people were reported to have been killed and more than 300 injured after fire tore through a crowded Buenos Aires nightclub during a rock concert early today.