Seventeen people have been injured in three bomb attacks in Afghanistan, with two in the southern city of Kandahar.
The attacks follow Saturday's bombing in the western city of Herat
The first bomb targeted Afghan army trucks passing through the city centre.
The second device, hidden nearby and detonated minutes later, targeted soldiers and civilians who had gathered at the scene of the first blast.
Hours later a suicide bomber in a car attacked an Afghan army base in the eastern province of Paktika, wounding six soldiers.
It was the first suicide attack in the province, near the Pakistani border, the local governor Akram said.
The bombing marks the third time in as many days that insurgents have attacked Afghan government forces or the Nato-led soldiers working with them.
On Saturday, a suicide bomber in a car attacked a base used by Italian peacekeepers in the city of Herat in western Afghanistan.
Four people - a local guard, two civilians and the bomber - died in the attack and seven were injured, including an Italian civilian.
In a similar attack on Friday, a bomber driving a car struck at a US military base in the capital of the Afghan province of Helmand, Lashkar Gah.
Three US nationals suffered minor injuries in the bombing.
Sunday's blasts in Kandahar are said to have been caused by devices concealed along a road in city centre.
Two Afghan soldiers were injured in the first explosion, the defence ministry said.
Several security personnel, as well as two civilians, were injured in the second blast.
Insurgents apparently allied to the Taleban have been blamed for the attacks.
Taleban spokesmen have said they plan to keep up attacks on foreign soldiers who enter the country as part of a beefed-up Nato-led peacekeeping force.
The Taleban militia governed Afghanistan until it was ousted by a US-led invasion in late 2001.