A Sunday midnight deadline to get concessions from The Boston Globe's unions to keep the U.S. newspaper alive passed without word from parent company New York Times Co or the unions.

The Globe's management has threatened to file notice as early as Monday that it will close the paper, one of the largest and most well known in the United States.

It is demanding $20 million in cost cuts from the unions to keep the paper open. The Boston Newspaper Guild said it has offered more than its share of $10 million in cuts.

(Reporting by Robert MacMillan; Editing by Kim Coghill)