Campaigners for three Irish men being held in Colombia say one of their lawyers is being followed by police and intelligence officers.
They are accusing Colombian officials of harassment and intimidation and say they're concerned for Pedro Mahecha's safety.
Human Rights groups and the Irish Government are being asked to protest to authorities in Bogota about the surveillance.
Niall Connolly, James Monaghan and Martin McAuley have been refused leave to return to Ireland while prosecutors appeal their acquittal on terrorism charges.
The three have elected to remain in prison amid fears for their safety.