Officials in southern Afghanistan say a suicide car bombing Sunday in Helmand province has killed at least five Afghan police officers and wounded a dozen people.

Authorities say the blast was detonated near police headquarters in Lashkar Gah.

The Taliban has claimed responsibility for the attack.

Security for Lashkar Gah was handed over this month from foreign to Afghan forces, the first stage of a plan to have all of Afghanistan under the oversight of Afghan security forces by the end of 2014.

In eastern Afghanistan, NATO says one of its service members was killed Sunday in a bomb blast.