Three female labourers were killed while four others were critically injured after being trapped in a mudslide at the site where they were digging a pond at Pataudi area here on Tuesday, police said.

According to police, the incident took place around 10:30 am when a mound of mud, around six feet high, fell on eight labourers digging a pond in Darapur village here. The digging activity was being carried out under the MGNREGA, the rural employment scheme.