A manhunt continued overnight for the man police say shot and killed a Mississippi sheriff’s deputy Friday.

The Mississippi Bureau of Investigation issued a blue alert Friday to let the public know of an armed and dangerous person on the loose.

Police say Joaqin Steven Blackwell described as a 22-year-old, black male, approximately 5 feet, 8 inches tall and weighing approximately 175 pounds was last seen wearing only white boxer shorts and on foot.

Blackwell is believed to have escaped from custody near the Region 8 mental health facility in Simpson County.

Investigators say he shot a Simpson County deputy, who was flown to a hospital where he later died. The identity of the deputy has not been released.

If anyone has information regarding the whereabouts of Joaquin Steven Blackwell contact the Mississippi Bureau of Investigation at 855-642-5378.