POLICE have uncovered a "substantial amount of powder" during a search by a dog.

The substance, believed to be heroin, was found following an incident on Halfield Road in the Heworth area of York at 6.30pm last night.

Detective Chief Inspector Helen Taylor said: "We have recently increased police activity in response to public concern about the availability of controlled drugs in York and North Yorkshire.

"I would like to reassure our communities that we are committed to tackling these issues, identified as priorities."