Two Nato service members have been killed in an insurgent attack in southern Afghanistan.
Nato did not provide any further details over the deaths, nor did it reveal the nationalities of the service members.
The deaths bring the number of foreign troops killed this month to 24. A total of 156 have been killed this year.
Afghan officials have also reported that a suicide bomber struck a police checkpoint in the country's southern area.
It is not immediately clear if the two attacks were related.
The Afghan officials said the attack in the south took place in Uruzgan province.
Fareeb Ayal, a spokesman for the police chief of Uruzgan, said a suicide bomber blew himself up at a police checkpoint near a marketplace in Tarin Kot, the provincial capital.
Mr Ayal said a Nato convoy was at the checkpoint at the time of the explosion. He said six children were wounded, two of them critically.
He added that there were some Nato casualties too, but did not provide any further details.
Salim Ahsas, a spokesman for the Afghan National Police in the south, said three Nato troops were wounded.
Taliban spokesman Qari Youssef Ahmadi said the Taliban were behind the attack.
The latest violence came as world leaders seek to tackle Afghanistan’s post-conflict future – with topics ranging from funding for security forces to upcoming elections – at a Nato summit in Chicago.