Police are searching for a teenager after officers were scrambled to reports of a male with a rifle in Cassiobury Park.

Response cars and a helicopter rushed to the park shortly before 12.30pm on January 2 after calls from members of the public.

The rifle is now thought to have been a toy. But officers would like to speak to the teenage boy, described by witnesses, brandishing the gun.

Anyone with information can call Hertfordshire Constabulary on its non-emergency telephone number 101.

Alternatively Crimestoppers can be called anonymously on 0800 555 111.