The creators of a Scrabble knockoff responsible for countless hours at the online hangout Facebook suspended their word game Tuesday after being hit with a lawsuit, disappointing fans on the Web site expecting to make their next moves.

Hasbro Inc., the company that owns the North American rights to the word game, last week sued the brothers in Calcutta, India, who created the Scrabulous program. Separately, Hasbro asked Facebook to block the program, something the site resisted despite risks of losing immunity protection from copyright lawsuits.