A suicide attack targeting police in northwest Pakistan late Sunday wounded five officers and badly damaged a vehicle, officials said.
The bomber struck a police patrol in Dera Ismail Khan town in the troubled Khyber Pakhtunkhwa province which borders Afghanistan.
"The suicide bomber was on foot. He blew himself up when the police vehicle was patrolling in a street," senior police official Qazi Jamil ur-Rehman told AFP.
"Five policemen were wounded, condition of one of them was critical," he said.
This was the second attack in two days in the country's northwest.
A policemen was killed and a local lawmaker was among eight wounded on Saturday when a suicide bomber struck after a rally on the outskirts of Shabqadar town, 35 kilometres (20 miles) northeast of regional capital Peshawar.
Islamist militants have killed more than 4,900 people across Pakistan since government troops raided an extremist mosque in Islamabad in July 2007.