Taliban suicide bombers have launched a second day of attacks in Afghanistan, killing at least four people.
The deaths, in the capital Kabul and the northern city of Mazar-i-Sharif, have raised tensions in areas that had been considered relatively secure.
A suicide car-bomber attacked a military-civilian convoy in Kabul in which at least three civilians were killed and five others were wounded.
Hours later, two bombers riding a motorcycle attacked a Swiss military reconstruction team in Mazar-i-Sharif, killing at least one Afghan civilian and wounding 15. The death toll is expected to climb from that attack.
The Taliban has said it was behind the attacks as well as two suicide blasts on Friday in south and central Afghanistan.
Suicide bombings and civilian casualties from both sides in the Afghan conflict are raising security and political tensions and threatening to erode local support for foreign troops.
NATO-led and US-coalition forces have more than 50,000 troops in Afghanistan and are under growing pressure to curb civilian casualties after a series of recent killings brought into question their tactics, such as aerial bombardment.
NATO has blamed the Taliban for using civilians as human shields and sucking innocent people into the conflict.
