Vehari: In a tragic incident during cleaning of sewerage manhole one person died first.
Later, three more sanitary staff went inside the main-hole while they also lost their lives owing poisonous gas in the sewerage main-hole.
They were identified as Aslam, Nawaz, Mushtaq and Asghar.
Chief Minister Punjab Maryam Nawaz has expressed sorrow on the tragic deaths in the incident.
