PESHAWAR, Pakistan — A series of attacks against Pakistani police by militants left five officers dead and eight wounded in a region where a government operation against insurgents has displaced 100,000 people, officials said.

There were four attacks with three resulting in officer casualties Thursday, police said.

Most died or were injured in a single attack in the Upper Dir district when armed men ambushed a police van early Thursday. Three officers died and seven were injured during the routine patrol, police official Ismail Khan said.

In the Peshawar suburb of Hassan Khel, armed men opened fire on a police station with automatic weapons. One officer died and another was wounded in an exchange of fire, Peshawar Capital City Police Officer Qasim Ali Khan said.

Two other overnight att

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