The attack triggered an exchange of fire that left one attacker dead.

The polling process had to be stopped for some time due to the ambush, though it resumed following a search and clearance operation by police, reported Dawn News.

The police vehicle was on security duty for re-polling on six polling stations at the National Assembly (NA-43) constituency of Tank-cum-Dera Ismail Khan, the newspaper reported.

Amid the deteriorating law and order situation, voting did not take place on February 8 at six polling stations including one at Kot-Azam in Tank and five in Kalachi tehsil of D.I. Khan.

A total of 5,438 registered voters were eligible to cast votes at these six polling stations. Officials said re-polling was held ‘peacefully’ amid tight security in rest of the polling stations, after the attack, reported Dawn News.