Organizers expect a large turnout at a rally against Indiana's newest law that opponents say could sanction discrimination against gay people.

The law's supporters say it will keep the government from compelling people to provide services they find objectionable on religious grounds.

The rally will be held Saturday afternoon in Indianapolis.

Republican Gov. Mike Pence signed a bill Thursday prohibiting state laws that "substantially burden" a person's ability to follow his or her religious beliefs. The definition of "person" includes religious institutions, businesses and associations.

Sixteen states have introduced similar legislation, which is patterned after a federal act.

Indiana's law has been widely criticized by businesses and organizations around the country. The Indianapolis-based NCAA has expressed concerns about the law, and has suggested it could move future events elsewhere.