A number of people were arrested at a crowded Super Bowl party at a banquet hall in Markham Sunday evening as police moved in on an alleged gambling ring.

Members of The Combined Forces Special Enforcement Unit (CFSEU) executed a search warrant at the LE PARC Banquet and Concert Centre at Highway 7 and Leslie Street as people inside watched the first half of the Super Bowl.

Police said afterward that they had dismantled a multi-million dollar illegal gaming operation.

The investigation was two years in the making and six people were arrested, police sources told CTV Toronto.

Police from all over the Greater Toronto Area participated in the raid. Some 2,000 people were said to be inside the venue when officers moved in.

An invitation posted to Twitter described the party as an ā€˜invitation only event.ā€™ It said the party would feature an open bar, dinner, door prizes and a calendar signing by Playboy centrefolds.

Police are expected to give more details about the bust at a joint press conference with the RCMP and York Regional Police Monday morning.