New Delhi, July 2 -- Mourners gathered Wednesday in Pakistan's eastern city of Lahore to bury 14 schoolchildren who were killed when the roof of a tutoring center collapsed on Tuesday.

Police are investigating whether negligence during ongoing construction work caused the collapse that left another eight children injured and hospitalized in stable condition.

Residents and preliminary police findings indicate the tutoring center was operating in an aging building. Investigators believe the unfinished roof of the second floor may have collapsed because of poor construction.

At least two people, including the building owner, were arrested as investigators tried to determine who was responsible, senior police official Kamran Faisal said, a...