Threat: Police Patrol Campus Of East Tech

Cleveland, OH - Developing news out of Cleveland's East Tech High School.

19 Action News has learned the school is on lockdown while police investigate a possible retaliation shooting.

The move is not a security lockdown but a measure to ensure no one leaves or enters the building.

This is near the area where Joy Cranfield was fatally shot on Thursday evening.

Cranfield was caught in the crossfire of a gun battle - the result of an argument earlier that day at East Tech.