A Massachusetts judge ruled on Tuesday that prediction-markets operator Kalshi cannot let state residents bet on sports through its online platform, after the state’s attorney general accused it of running afoul of gaming regulators.

Suffolk County Superior Court Judge Christopher Barry-Smith in Boston said he will issue a preliminary injunction, at the request of Massachusetts Attorney General Andrea Joy Campbell that would prohibit Kalshi from allowing users in the state to use its platform to place financial bets on the outcomes of sporting events without a license.

“There is no real question that licensure, and the consequent oversight, of sports wagering operations in the state serves both public health and safety, and the Commonwealth’s financial interest,” Barry-Smith wrote.

The judge said he plans to finalize an injunction requiring the company to comply with the state’s sports wagering law going forward following a hearing on Friday, where he will also consider whether to pause his order to allow time for an appeal.

Campbell in a statement called the ruling “a major step toward fortifying Massachusetts’ gambling laws and mitigating the significant public health consequences that come with unregulated gambling.”