Ahmad Zia Abdulzai, a spokesman for eastern Nangarhar province, said four policemen were killed and seven wounded when their pickup truck ran over a bomb in in the Agam district. He said the dead included the district's police chief.
He said that in an earlier incident, a suicide bomber attacked an intelligence service office near the border with Pakistan, shooting and wounding a guard before detonating his explosives. He added that two intelligence service officials were wounded and the building was damaged by the blast.
The interior ministry said in a statement that four civilians were killed when their car drove over another bomb in the Shegal district of Kunar province. It said the attack wounded one person.
No group claimed responsibility for the attacks. The Taliban frequently use roadside bombs and suicide attacks against Afghan and Nato forces and government offices in the country.