At least 10 people are reported to be trapped under the debris after a four-storey building collapsed at Uttam Nagar area in New Delhi today. According to the Delhi Police, so far no casualty has been reported from the incident site.The fire brigade and police personnel have rushed to the spot and search operation are on in full swing to rescue those feared trapped under the debris. The building collapsed when the foundation for another upcoming tenement close by it was being laid.