Three labourers died and another wounded critically when the roof of a three-storey building collapsed IN North Cantonment area during windstorm on Wednesday. Rescue workers said the structure located near Chungi Dogage was under construction. The labourers were fixing the roof lenter on the third floor when it collapsed on them during the windstorm.  Rescue workers rushed to the site soon after the incident and managed to pull victims out of the debris after hectic efforts. Three of the four victims were recovered dead while an injured person was shifted to hospital in critical condition.  The deceased men were identified as Nazir Hussain, 38, Pervaiz, 30, and Sajjad 32. The bodies were shifted to hospital. The city district government officials were also investigating the incident.–Staff Reporter