The Pentagon will test security equipment Sunday morning in the south parking lot, shooting guns in a controlled space, officials said.

Between 6 a.m. and noon, the agency plans to test a gunshot detection system that will be used to alert Pentagon officials if a gun is fired near the building.

The equipment is in part a response to the case of to Yonathan Melaku, who is accused of firing a gun at the Pentagon last year, officials said.

People near the Pentagon on Sunday may hear gunshots and see testing facilitators with yellow safety vests. The Pentagon Force Protection Agency will restrict public access to some locations around the south parking lot during the testing.

The Pentagon may change the testing day to Saturday if inclement weather is predicted for Sunday, authorities said.