The Nassau County police unions — Police Benevolent Association, Detective Association Incorporated and the Superior Officers Association — are holding a fundraiser today to benefit the families of the slain Dallas police officers.

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The event will be held at Mulcahy’s Pub and Concert Hall at 6 p.m.

A $50 donation will include a two-hour open bar and then discounted drinks, a buffet, a Chinese auction, a 50/50 raffle, a live auction for concert and sporting-event tickets donated by the John Thiessen Children’s Foundation and much more, a news release from the associations said.