Four people were killed Thursday in a "gas cylinder" explosion in the Qatari capital, state television reported, airing footage of serious damage. The explosion tore through a restaurant attached to a mall in Doha, Qatar Television said. It was not immediately clear whether the blast was accidental. Footage showed paramedics carrying a covered body past rubble strewn some 50 metres (yards) away from the building, whose roof had caved in. Pictures posted on Twitter showed several damaged cars. A witness said police had cordoned off the area. Source: AFP