There has been a major increase in the number of offences recorded under anti-terrorism legislation in Dumfries and Galloway.
Police used anti-terror measures to deal with 66 incidents over the past 12 months, mostly at the ferry port unit, compared with one in the previous year.
Most crimes involved producing false ID or giving false personal details.
Chief Constable David Strang said the figures were linked to security after last July's bomb attacks in London.
Details of the situation have been outlined in a newly published annual performance report.
More than 1.8m passengers and 760,000 vehicles passed through the ports of Cairnryan and Stranraer last year.
Mr Strang said the region had to play its part in the national increase of security.
"I think the awareness of terrorist issues is raised for everybody and the port plays an important part in checking people who come through," said Mr Strang.
"There are powers under the prevention of terrorism act to examine people who they suspect.
"There has been an increase in the number of international travellers and people who have been of interest from a security point of view.
"That reflects, I think, the general state of alert that we in the United Kingdom have to be in," he added.
"We have to play our part here in Dumfries and Galloway."
Det Chief Insp Steven Carr said the majority of offences related to illegal immigrants or failed asylum seekers producing false ID or giving false details.
"These are classified as crimes under the Terrorism Act 2000," he said.
"There were 1.8m passengers who passed through the ports last year and 61 different nationalities were checked in partnership with the UK Immigration Service.
"This work resulted in the offences above being detected."