COUNTER terrorism officers are to talk with workers in Barnsley about the heightened threat level.
A letter from South Yorkshire Police has been issued to businesses regarding the threat, which comes as a result of Islamic State tensions in Iraq and Syria.
Det Insp Colin Wilson said: "The briefing is intended to bring staff up to date with the current threat levels as well as providing practical advice and assistance in identifying and reporting suspicious activity."
The meeting is on November 26 from 9am to 12noon.
Businesses are asked to email a list of those wishing to attend to email@example.com.