A special constable was injured last night while attempting to detain a 15 year old with a knife.
Police were called to Witham train station shortly before 8.15pm to reports of the boy with the weapon.
After a short chase, in which the special constable fell and grazed his legs and arm, the boy was arrested.
He has been charged with possession of an offensive weapon and has been bailed to appear at Colchester youth court on March 4.
