Three people were reported injured after a portion of a three-storey building collapsed near Arya Samaj Road in Delhi's Karol Bagh area, news agency ANI reported on Thursday. Three injured after portion of a three-storey building collapses in Delhi's Karol Bagh area pic.twitter.com\/W60to1CneW \u2014 ANI (@ANI_news) July 28, 2016 However, the reason behind the collapse is not clear yet. Three weeks ago, several incidents of building collapses were reported in the city after overnight rains. Two buildings had collapsed in east Delhi although no casualty was occurred. More inputs on the news are awaited.