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(Memphis) The security guard accused of pushing a man from a MATA bus has been arrested and charged with aggravated assault.

Adicus Mitchell, 49, was detained by police earlier this afternoon.

He will not be allowed back on MATA property.

More than one witness said the guard pushed a man from the bus, seriously injuring him.

The man is in critical condition, according to police.

One woman, who said she saw the incident, told WREG the guard pushed the man who fell face down and reportedly suffered a seizure.

A photo taken by a bus rider shows a man face down in a puddle of blood.

The witness told WREG the man’s wife and a person who appeared to be his granddaughter witnessed the incident.

Memphis Police crime scene investigators were at the downtown MATA station talking with people and going through the bus.

Interim MATA CEO Tom Fox told our Michelle Reese he is ‘disturbed and appalled’ by the allegations.

Fox confirmed there was an incident on the bus and the driver called for security.

Mitchell is an employee of Pro-Tech, which is contracted to provide security for MATA.