Kevin Frayer, Associated Press
An Afghan police trainee from the United States Marine police mentoring program looks on as others speak to locals during a patrol in Khan Neshin, in the volatile Helmand province of southern Afghanistan earlier this week.

KABUL — Afghan police say two police officers and three civilians have been killed when a motorcyclist blew himself up in eastern Afghanistan.

Police chief of Paktika province Gen. Dawlat Khan says five other officers and 16 civilians have been wounded in the midday Friday blast.

He says the suicide bombing occurred in a crowded area of the provincial capital of Sharan.

Security in war-torn Afghanistan has declined amid a thriving Taliban insurgency in recent years. The United States is about to send 30,000 more troops to help stabilize the country.