(AP) _

Three same-sex couples plan to sue Nebraska because they say the state won't allow them to become foster parents.

The American Civil Liberties Union plans to hold a news conference Tuesday morning to discuss the lawsuit it plans to file on behalf of the gay and lesbian couples.

Tyler Richard with ACLU Nebraska declined to discuss details of the case before the news conference.

Current state policy bans openly gay people and unrelated, unmarried adults who live together from serving as foster parents.

State lawmakers considered a bill earlier this year that would have allowed gay and lesbian couples to serve as foster parents, but that bill failed to advance before the legislative session ended.