Police are believed to have been called to an incident at Wolviston Services.
Cleveland Police have not released any details of the incident, but a spokeswoman from a petrol station at the services - which is off the A19 and A689 at Wolviston - was able to confirm that police has attended an incident at some time tonight.
It is also believed that a section of the Wolviston Services' petrol station has been cordoned off by police.
A spokesman from Wolviston Services' KFC confirmed that customers had seen a police presence in the area.
The nature of the incident is not yet known, however KFC said that it was able to continue to operate business as normal.
More information to follow.