Cleveland Police have been carrying out an operation across Eston this evening with a number of properties targeted and arrests made.
Armed Police were seen to detain least three males at a property on Kingsley Avenue in Eston. Properties have also been searched nearby in Fabian Road and Westminster Close.
A large number of other tactical officers were involved in the operation including the Matrix team dog unit, and the police drone.
Large crowds were seen gathered at the various scenes.
More information will be provided as it becomes available.