Even United States federal agents are taking fantasy football ultra seriously nowadays.

One of the largest NFL survivor picks pools, Ron & Mike’s Football Pool, had its documentation and money – collected by pool organizers – seized by federal agents who shut down the competition, sources told ESPN’s Darren Rovell.

There were at least five pools within the organizers’ control with a minimum of $2.5 million at stake for the winners. A note was sent to users who were still competing in the pools after their website was voluntarily shut down.

Please be advised that the Ron and Mike website has been forced to shut down at this time and is unlikely to open again.

We understand your frustration and anger at this time but closure of the pool is beyond our control. We apologize to those that are still alive in our various pools and we ask for your patience and understanding while we contemplate the next steps. Unfortunately at this time we cannot make any additional comments.

The attorney for the organizers says neither he nor his clients have been given details from the government other than a search warrant issued by federal prosecutors in the Eastern District of New York, according to ESPN.