The New York Civil Liberties Union announced Monday that Blue Cross & Blue Shield of Western New York, based in Buffalo, will begin extending spousal benefits to legally married same-sex couples, Canwest News Service reported.

The decision comes after the group filed suit in the case of a lesbian couple from the United States who were married in Canada.

"We applaud Blue Cross & Blue Shield of Western New York for following the law and treating all married couples the same," Donna Lieberman, NYCLU executive director, told CanWest in a statement.

Same-sex marriage is illegal in New York, but the couple had traveled to Canada to be legally married in 2006, the news service said.