The warrants form part of Operation Tofano: an intelligence led, phased operation established in and around Croydon. The police activity was launched in response to ongoing reports of drug dealing, drug use, violence and anti-social behaviour.
The morning raids, on Thursday, 13 August, mark a second successful day of action.
Over the past two days officers have arrested a total of 17 men and two women – aged between 16 and 45-years-old. They were arrested for offences including drugs supply and modern slavery offences in relation to child exploitation.
More than 200 officers took part in each of the two days of the operation. It was led by local officers with additional support provided by officers from the Territorial Support Group.
Throughout the operation officers executed 30 warrants at various residential addresses in Croydon.
Nine people were arrested on Wednesday, 12 August and they have been charged and remanded in custody to appear at court this morning.
Those arrested on Thursday, 13 August remain in custody at a south London police station pending further enquiries.
Items seized so far include quantities of Class A and Class B drugs, and a quantity of cash.
Searches are ongoing.
Detective Chief Inspector Dan O’Sullivan from South Area Command, said: "Our commitment to combat criminality and anti-social behaviour has never been stronger. We always seek to improve and develop stronger and more effective tactics to do this but we need our community to help us.
"The support of the people we serve is essential to achieve positive change and today I would like to thank all those who have helped us. We will always act on the concerns of the community and work with them to tackle criminality blighting neighbourhoods.
"If you do have concerns or intelligence please call police on 101, if you wish to remain anonymous, you can call Crimestopppers on 0800 55 111.