OMAHA, Neb. (AP) — An anti-abortion group that displays graphic signs of aborted fetuses is targeting Omaha-area high schools.

The Abolitionist Society of Omaha has been demonstrating outside several high schools this year, including Millard West, Millard North, Bellevue East and Bellevue West High Schools. The group equates its fight against abortion to the effort to abolish slavery.

Group founder and director Tim Locklear says the group demonstrates outside schools to target young people. Locklear says a large number of high school students nationwide experience unplanned pregnancies and that high school is a time when students’ views on abortion are being formed.

Some students and parents have been upset by the protests and graphic signs, but officials say the protesters have a right to congregate.