An under-construction building at the Kannauj railway station collapsed on Saturday afternoon, trapping around two dozen workers under the rubble, officials said. At least 23 people have been injured in the incident. Six of them were pulled out of the debris and rushed to hospital, they said. The North Eastern Railway (NER) said it has constituted a three-member committee to probe the incident. Initial visuals from the site showed scenes of chaos and confusion with crowds, clouds of dust and broken beams as people tried to rescue those who had been trapped.