Police are urging the public not to rely on others when it comes to reporting suspicious behaviour that could be linked to terrorism in Warwickshire.
The appeal comes at the start of a nationwide campaign to raise awareness of the Anti-Terrorist Hotline (0800 789 321) - a dedicated number staffed 24/7 by specialist counter terrorism officers.
A series of 'Don't Rely On Others' press, billboard and radio adverts will urge people to call the number if they have any concerns about unusual behaviour or activity in their neighbourhood.
The security threat in Britain remains classed as severe and police across the country believe the public can play a vital part in providing information that could help disrupt terrorist planning and save lives.
Warwickshire Assistant Chief Constable Bill Holland, said: "The security situation nationally remains severe and it is the responsibility of all of us to help protect our communities from harm.
"One small piece of information could prove vital for the police in bringing criminals to justice. One call from a member of the public could make all the difference in stopping would-be murders in their tracks.
"We would much rather people ring the hotline, and it turn out to be nothing at all, than miss something important."
Callers to the Anti-Terrorist Hotline can speak in confidence to officers to discuss their concerns. However, the number should not be used for emergencies.
Call the Anti-Terrorist Hotline on 0800 789 321. In emergencies always call 999.