A reward is on offer following a series of attacks on emergency workers in the North East.
Northumbria's Police and Crime Commissioner, Kim McGuinness, is working with independent charity Crimestoppers to offer £1,000 for any information leading to the arrest and charge of those responsible.
In recent weeks, police officers have been spat on, paramedics have been assaulted and firefighters have had rocks thrown at them when attending deliberately started fires.
Crimestoppers is now appealing for people to speak up anonymously against these unacceptable behaviours and help prevent further threats.
Kim McGuinness is calling on Government to ensure the courts use their full powers when sentencing those convicted of attacking emergency service workers.
Anyone can contact Crimestoppers online via their untraceable online form at www.crimestoppers-uk.org, or you can call their 24-hour UK Contact Centre on freephone 0800 555 111.