ADDISON, Texas -

An Amber Alert has been issued by the Addison Police Department.

Authorities are searching for a Michael John Mitchell. He is 19 months old,  2 feet-6 inches tall, weighs 45 pounds and has brown hair and brown eyes, according to officials.

Police are also looking for Tommy Williams in connection with Michael's abduction. The 41-year-old is listed as 5 feet, 10 inches tall, weighing about 180 pounds with black hair and brown eyes.

Investigators say Williams is driving a black 2004 Mercedes Benz CL500 with a Texas license plate number of DX8X785.

Williams was last seen in Addison, according to law enforcement.

Police say Michael is in grave or immediate danger.

Anyone with information about the abduction is encouraged to call the Addison Police Department at 972-450-7156.