A former mayor of Donegal has called on the Irish government to investigate a PSNI 'incursion' into the republic.
A PSNI Land rover was captured on camera straying into the border town of Lifford on Wednesday.
It crossed Lifford Bridge from Strabane and travelled onto a roundabout outside the Co Donegal town before turning and coming back into Co Tyrone.
The PSNI has confirmed the vehicle "inadvertently" crossed into the republic but turned back at the earliest opportunity.
A spokesman said the driver, on realising his mistake, turned at the next available roundabout which happened to be in Lifford.
"Police have made An Garda Siochana aware of the incident," he said.
However, Donegal councillor frank mcBrearty has described the incursion as an "international incident".
"I contacted [Garda] chief superintendent Terry McGinn. She confirmed to me that she had no idea of this incident and she asked me to email her about the incident which I have done.
"I have also emailed the minister for justice [Alan Shatter] to ask the British authorities and the British government why the PSNI were in our jurisdiction and especially with the threat of dissident republicans."
The councillor said that had dissident republicans known about the Land rover they could have "opened fire" on it.