New York’s casino wars intensified Thursday, as Nassau County published text messages that it said presented a “smoking gun” showing Hofstra University has coordinated with Steve Cohen in his bid to put a casino at Citi Field.

Hofstra, Long Island’s largest private university, has fought publicly to derail the county’s efforts to bring a casino to the Nassau Coliseum, which is located at the school’s doorstep.

Nassau County, in turn, subpoenaed the university for private communications from the university’s president concerning the state-run downstate casino bidding process. On Thursday, the Republican-led county released screenshots of texts apparently from Hofstra’s president, Susan Poser, that it said showed evidence of the school’s collusion with the Queens bidder.