At least nine people have been killed in a series of attacks across Afghanistan, police say.
In the most serious violence, at least five policemen were killed and six injured in what police say was a Taleban ambush in Zabul province.
The attack took place on the highway linking Kabul to Kandahar, police said.
A man claiming to speak for the Taleban said the group carried out the attack, which blocked the road for several hours and left drivers stranded.
Correspondents say that Zabul province is well known as Taleban hotbed .
In another incident, in the eastern town of Khost, police told the BBC News website that a suicide bomber blew himself up outside a police station, and another suicide bomber was shot dead by police. Two policemen were also killed.
In a third incident, a suicide bomber targeted a Turkish diplomatic convoy on the outskirts of the capital, Kabul, wounding at least one Afghan civilian, police and witnesses said.
A Turkish embassy official told the Associated Press news agency that shots were fired at a damaged armoured vehicle in the convoy, wounding one Turkish guard.
Nato troops blocked off the site of the blast, on a main road leading out to the west of the city.
Police also say that a Filipino road engineer and his Afghan guard were killed in a Taleban ambush in the south-eastern province of Paktia.
Correspondents say the south of the country this year has seen the worst violence since the Taleban were ousted from power in 2001 by a US-led international coalition.