MOORE, Okla. — A suburban Oklahoma City public school system has reached an agreement with the families of seven children killed in a 2013 tornado, ending three years of litigation.

In a statement, the Moore Public Schools said the families have agreed to accept $14,000 each to settle the lawsuit arising from the destruction of a classroom addition at Plaza Towers Elementary School. The families had alleged the addition, where the children were killed, was defectively built.

The May 20, 2013, tornado leveled large portions of the city of Moore, including the school, and killed 24 people. Another 377 people were injured by the tornado, which was rated at EF5 — the most severe on the National Weather Service scale.