Authorities say separate roadside bombs targeting police vehicles have killed 10 people in Afghanistan.

The deadliest of the two blasts Monday happened north of the capital, Kabul. Abdul Sami Sharifi, an administrative chief of Kabul's Qarabagh district, said the bombing killed four police officers and two civilians.

In northern Baghlan province, police said a second roadside bomb killed four police officers. They said two other police officers were wounded in the attack in the province's Baghlani Murkazi district.

No group immediately claimed responsibility for the two attacks. However, Taliban insurgents often use roadside bombs in their campaign against the U.S.-backed government.