The planned extradition to the United States of a suspected arms dealer, Viktor Bout, has been hit by delays.
A US plane was ready at the Don Muang air force base north of the Thai capital, Bangkok.
But legal delays emerged to postpone the extradition of Mr Bout, a Russian citizen.
The US and Russia have been squabbling over the fate of Mr Bout since his 2008 arrest in a joint Thai-US sting operation.
A court ruled last week that he could be handed over to the US – but Russia then voiced strong opposition.