jaipur six labourers working at a construction site were injured when the portion of an underconstruction shop collapsed at pratap dairy area on the niwaru road of jhotwara in jaipur on saturday one labourer was critically injured while the others have sustained minor injuries police said the incident took place in the morning suddenly the portion on which they were standing collapsed and they were trapped under the debris some locals informed the police control room a team of senior officers from jhotwara police station and civil defence team reached the spot said an officer of jhotwara police station the civil defence team pulled out the labourers from the debris and rushed them to hospital the condition of one labourer identified as dinesh is critical the officer saidpolice said that preliminary investigation suggests that substandard material was used in the construction which led to the mishap the matter is under investigation and the contractor and the owner of the land will be questioned soon the officer added