The lioness kills lion, the father of her three cubs

A lioness has killed the father of her three cubs in a U.S. zoo.

Zuri, 12, attacked Nyak, 10, but the staff of Indianapolis Zoo couldn't separate them and Nyak died of drowning.

The two lions lived in the same siege for eight years and had three cubs together in 2015.

In a Facebook post, the zoo staff said they would do a <x0 complete “investigation to understand what happened.

“Nack was a great lion and we will miss him very much,”-written in post.

The staff said they were alarmed after hearing unusual noises at the zoo.

When they left they saw Zurin picking up Nyak from his neck and despite trying to separate, the lioness kept shaking her partner until he stopped moving.

As the statement added that there has never been any aggression between them.