Pakistani security officials examine the wreckage of a car following a bomb attack in the Bazidkhel village on the outskirts of the city of Peshawar in the north of the country on June 12, 2012.
At least two police officers have been killed and four others wounded in a militant attack in the eastern Pakistan province of Punjab.
The attack took place early on Tuesday when a group of gunmen opened fire on a police car in the Jhang district of the province.
The policemen were searching suspected criminals in the area when they came under the attack. Police officials have launched an investigation into the incident.
The assailants managed to escape the scene. No group has claimed responsibility for the attack so far.
Thousands of Pakistanis have lost their lives in bombings and other militant attacks since 2001 when Pakistan joined an alliance with the United States in the so-called war on terror.
Since late 2009, there has been a surge in militant attacks in Pakistan and thousands more have been displaced by the wave of violence and militancy sweeping the country.