KABUL, Afghanistan (AP) — A suicide bomber attacked people leaving a memorial service at a mosque in northern Afghanistan today, killing a district chief, his apparent target, and seven others, police said.

At least 11 people were wounded in the strike, whose victims included several civilians.

The apparent assassination was the latest attack in a particularly bloody week in Afghanistan, further underscoring the tenuous security situation here.

No group immediately claimed responsibility for today’s attack, but suspicion fell on the Afghan Taliban. The militant group has escalated its actions in recent months to take advantage of the drawdown of U.S.-led foreign troops, who handed over security for the country to Afghan forces two months ago.