US Secretary of State John Kerry has expressed concerns over the planned peace talks with the Afghan Taliban, after a row over the group's office in Doha.
Mr Kerry told reporters in Doha: "We need to see if we can get back on track." adding that he was sunsure whether this was possible.
"We are waiting to find out whether the Taliban will respond," Kerry said.
The row erupted after the Taliban raised their flag above their office in Qatar and installed a name plate saying "Islamic Emirate of Afghanistan". The name was changed, however the flag was raised again on a shirter flag-pole, drawing anger from Kabul.
"The manner in which the office was established was in clear breach of the principles and terms of references agreed with us by the US government," the Afghan foreign ministry said in a statement.