Seven Afghans were killed and several wounded today in two separate bomb explosions, police said.
A roadside bomb aimed at a senior Afghan police officer killed at least four civilians and wounded four, including the policeman.
Another explosion aimed at a convoy of foreign troops killed three policemen and wounded several, police said.
The remote-controlled blast that killed four happened on a bridge on the main highway just south of the western city of Herat bordering Iran.
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Herat is generally considered one of the safest parts of Afghanistan in the bloodiest year since the Taliban were ousted in 2001.
More than 4,000 people have been killed in fighting this year, a quarter of them civilians.