Taliban insurgents including at least two suicide bombers have attacked a Nato base in Herat, the largest city in western Afghanistan. Four people have been killed and up to 24 others injured, according to local authorities.
The base at Herat is an Italian-run joint civilian and military Provincial Reconstruction Team.
Some witnesses say a number of insurgents entered a seven storey building near the PRT and opened fire on the base from there.
Violence has spike across the country since the beginning of May after the Taliban announced a spring offensive.