A man aged 27 was arrested for possession after a quantity of suspected cannabis was found at a flat in Douglas Close, Wallington, after he opened the door to officers as they arrived at 08:10hrs.
A man aged in his 20s received a cannabis warning after a small quantity of cannabis was found at an address in Mill Green, Mitcham.
Another man, aged in his 40s, also received a cannabis warning after a small quantity of cannabis was found at an address in Winchcombe Road, Carshalton.
The operations, which were based on information from the local community, were designed to disrupt and deter criminal behaviour around drugs possession and supply.