Police in Carlisle carried out an operation to target drug supply on nights out, with 24 people searched and four arrested.
Operation Optical saw passive drugs dog Lucky taken onto the streets of the city centre as part of moves to make it as safe as possible.
Officers and Lucky entered a number of venues on Saturday night.
And a number of positive searches of people during the course of the night led to drugs being seized.
Four men in their twenties were arrested on suspicion of possession of class A drugs.
Their cases remain under investigation.
Five underage people, aged between 15 and 17, were also found in licensed premises.
Police out on the night say the operation was welcomed by the public and staff at the bars and venues visited.
This type of operation will be repeated.
PC Jamie Minnett led the operation, carried out by the Local Focus Team and the dog unit.
He said: “Operation Optical is intended to disrupt possession and the supply of illegal drugs around Carlisle’s night time economy.
“It also aims to reduce violent crime associated with drug taking and gather information about drug use and identify prevalent locations.
“Operation Optical was well received from members of the public, door staff and the vast majority of licensees, who welcomed our presence.
“Operation Optical will continue over the coming months in a variety of locations across north Cumbria, with the sole aim to disrupt class A drug use and protect vulnerable people.”
Inspector Diane Bradbury, of the Local Focus Policing Team, said: “The operation works alongside Operation Meerkat, which aims to reduce violent crime and keep people safe on nights out.
“It is part of a long term safeguarding strategy in which licensees, the council, Street Pastors, door staff and police work together.”
