A series of raids in Lincolnshire have seen £60,000 of suspected drugs seized and eight people arrested.
Police said the single largest find was an estimated £50,000 worth of suspected cocaine and amphetamine from a house in Keddington Avenue, Lincoln.
Officers said they believed the week-long operation would have a significant impact on crime in the area.
They added that work to target drug supply was ongoing and appealed to residents for help and information.
'Reclaiming our streets'
In four other raids in Lincoln, and two in Cherry Willingham and Sleaford, suspected heroin and cannabis were also seized.
Det Insp Simon Lovett said: "We know from the public that drug houses in streets where you live are a nightmare. They attract crime and anti-social behaviour through the day and night as offenders steal to feed their habits.
"Add to that the wider issue of the impact of Class A drugs on young people in the community, and it is clear that we need to stay on top of the issue and work towards reclaiming our streets back from these criminals."
All eight people arrested have been bailed pending further enquiries.