MUMBAI: Three persons, including an engineer, were killed when the slab of an under-construction water tank collapsed in Nanded district, around 500 km from here, police said on Monday.

The incident occurred at around 10.30 pm last night at Atala village in Dharmabad tehsil of the district, they said.

A mason and a labourer were also killed in the incident, they said.

The person who was injured has been shifted to the government hospital in Nanded, sources said.