New England's only thoroughbred horse racing track has told its workers it will close by the end of the year because Mohegan Sun did not win a state license for a resort casino at Suffolk Downs.

Chip Tuttle, Suffolk Downs' chief operating officer, said workers were told Wednesday that the live horse racing season that ends Sept. 29 will be its last. The track will continue to offer simulcast racing until November or December.

In the coming days, he said, the track will formally notify workers at concession stands and other vendors, as well as the owners, breeders and trainers of the horses that compete at the facility.

State gambling regulators this week picked Wynn's $1.1 billion resort for the Everett waterfront over Connecticut-based Mohegan Sun's $1.1 billion proposal.