Chicago police fatally shot a 16-year-old boy after he allegedly pointed a gun at officers.

The Cook County medical examiner's office has identified the teen as Rakeem Nance.

Chicago police say officers were patrolling on the South Side Thursday night when they saw three men running across a vacant lot, including one who was wearing a mask and carrying a gun.

Officers started chasing them, and two got away. The third, who was carrying the gun, was cornered, and police say he refused to drop his weapon.

Police say an officer shot Nance after he pointed the gun at officers arriving on the scene. No officers were injured.

Police say the three had committed a home invasion just before officers arrived.

The Independent Police Review Authority is investigating the shooting.