A four-storey building under construction collapsed Saturday in eastern New Delhi, killing at least six people and injuring another 16, a fire official said. Those killed were mostly workers at the site of the building in Brahmpuri area, said fire official Harinderjit Singh. Rescue work was continuing as more people were feared trapped in the rubble, Singh told The Associated Press. All the injured have been hospitalized, most of them in serious condition, he said.