Eight people including a policeman were killed and 30 others were wounded on Friday in a Taliban suicide car bomb attack on police headquarters in a city in eastern Afghanistan, police said.

A bomb blast in the Afghan capital killed a police officer and wounded three other people early on Tuesday, a government official said, on the day marking the adoption of the country's post-Taliban constitution.

The blast, a rarity in Kabul, served as a grim reminder of insurgents’ ability to strike at will across the country. It was a jarring preamble to the scheduled departure on Tuesday of members of a government-appointed peace delegation to Pakistan, where they will meet with Pakistani officials and discuss efforts to launch talks with Taliban rebels.

At least two suicide bombers stormed a police headquarters in southeastern Afghanistan Saturday, killing 12, officials said.