A pro-life group is suing Oklahoma State University.
They are called Cowboys For Life and they've filed suit in federal court.
The lawsuit says the school wouldn't let them Pass out signs and leaflets.
KTUL.com has learned that those materials contained graphic images.
OSU's facilities use policy allows the school to limit expressive demonstrations.
That's intended to avoid disruptions and protect the public order.
The anti-abortion group wants that policy changed.