The checkpoint attack took place in Jawzjan province, said Abdul Manan Raoufi, the region's police operational chief.
Along with the seven killed, five other policemen were wounded in the attack late Saturday in a village in the province's Qashtepa district.
Police reinforcements were sent to the location and a gunbattle ensued in which five insurgents died, Raoufi said. The Taliban claimed responsibility for the attack.
"There are casualties among civilians who are stuck in the battlefield but we don't know how many right now," he said. Elsewhere in Kunar, seven civilians, including two children, were killed when their vehicle hit a roadside bomb in Nari district late Saturday, the spokesman said. Three other civilians were wounded in the blast.
Hatami, a cameraman with the privately-run Mitra Television, was seriously wounded when a teenage suicide bomber blew himself up during a performance at the Etsiqlal High School on December 11.
A German aid worker was also killed in that attack.
Taliban militants have intensified their war on the Afghan government in recent months, and have been hitting soft targets such as schools and foreign guesthouses in the capital ahead of the withdrawal of most foreign combat forces on Dec. 31.
