Barack Obama condemns Buhari's killing of unarmed civilians

The United States President, Barack Obama condemns the killing of unarmed civilians.
He asked president Muhammadu Buhari to probe the clash between the Nigerian army and Islamic movement earlier in Zaria Nigeria.  The US government said that the clash resulted to the loss of several civilians lives. He calls on the Nigerian Government to quickly investigate the issue in Zaria and take account of any individuals found to have commited crimes.