A US high school is on lockdown amid reports of a gunman
Students and staff at US Grant High School in Oklahoma City have been put on lockdown as a precaution as armed police investigate.
Police received reports of a possible gunman on campus just before 3.30pm as students were leaving for the day.
Officers are searching the school near South West 48th Street and South Penn Avenue.
The school says all after school activities are cancelled.
More to follow…