Police have carried out inquiries in Dumfries in connection with the failed bombing attack on Glasgow Airport.
A sighting of the vehicle has been claimed in Dumfries
It followed a report that the vehicle used to ram the terminal building may have been sighted at the Heathhall Industrial Estate a week earlier.
A security guard reported the Jeep used in the attack had been on the industrial estate the previous weekend.
A police spokesman said the force was committed to ensuring people in the area were protected from terrorism.
CCTV tapes from surveillance equipment in the Heathhall area are being examined.
Police officers carried out searches in the area and interviewed workers from firms on the site.
One of the companies involved, West Skelston Services, stocks several types of gas cylinders.
They have been asked what had been sold in recent weeks and who bought them.
General manager Colin Sterritt confirmed the police visit but said, as far as he knew, no-one they were looking for had purchased cylinders from them.
"It follows a report from a security guard from the firm on the estate who said the number of the Cherokee matched the number of a vehicle he had seen on here a week past on Saturday," he said.
"They are now examining all the security tapes from all the surveillance equipment in the area.
"The man who reported this is a very reliable and conscientious employee and I would not doubt what he says."
Dumfries and Galloway Constabulary confirmed that they had been called out to the industrial estate.
"Our force received a call from a local security guard who believed he saw a Jeep Cherokee vehicle, similar to the one used in the attack at Glasgow Airport," said a spokesman.
"The vehicle was seen to be parked up in Heathhall Industrial Estate, several days before the Glasgow Airport incident.
"We are presently conducting investigations in this regard and enquiries are still ongoing at this time."
He confirmed that measures had also been taken at two of the main tourist routes into the region.
"Security has also been increased at the ports of Stranraer and Cairnryan as a result of the incidents over the weekend and we urge people using these ports to work with us in this regard and remain patient and vigilant," he said.
"Officers across the force are fully briefed and are carrying out extra high visibility patrols in all public places."