At least four labourers were critically wounded in a landmine explosion in Pir Koh tehsil (revenue unit) of Dera Bugti District in Balochistan on July 26, reports The Express Tribune. According to Levies sources, the incident occurred in Pir Koh, where laborers were loading sand from Patar-Nala when their tractor trolley was hit by a land-mine planted by unidentified terrorists.