South African authorities have shut down a number of sites offering illegal gambling services.

On Friday, officers of South Africa’s Directorate for Priority Crime Investigation (aka the Hawks), operating alongside local branches of the South Africa Police Service, raided 27 premises in the Northern Cape and North West provinces that were suspected of offering illegal online gambling services.

The raids, which followed months of police surveillance, resulted in the closure of 19 venues at which punters could access computers that connected to unauthorized gambling sites. Police seized numerous computers, other IT gear, some on-site gambling machines in addition to an undisclosed amount of cash.

Three individuals believed to be behind the venues’ operation have been arrested, with police vowing more arrests are imminent. The suspects, who were due in Kimberly Magistrates Court on Monday, will likely face charges including corruption, money laundering and racketeering, as well as violations of national and provincial gambling laws.