The US is engaged in talks with the Taliban, Afghan President Hamid Karzai has said, in the first high-level confirmation of US involvement.
Mr Karzai said that "foreign military and especially the US itself" were involved in peace talks with the group.
Hours later, suicide bombers attacked a Kabul police station, killing nine.
Earlier this month, US Defence Secretary Robert Gates said there could be political talks with the Taliban by the end of this year.
The US is due to start withdrawing its 97,000 troops from Afghanistan in July.
It aims to gradually hand over all security operations to Afghan security forces by 2014.
Summer of fighting
"In the course of this year, there have been peace talks with the Taliban and our own countrymen," Mr Karzai told a Kabul news conference on Saturday.
"Peace talks have started with them already and it is going well. Foreign militaries, especi
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