An Amarillo man is robbed at knife point in Martin Road Park late Thursday night.
The 20 year old victim says a black man approached him and demanded valuables.
The suspect was riding a bike northbound in the park.
He is described as about 20 years old, 5-6, wearing a black ball cap with the letter "P".
He also had a black hooded sweatshirt.
Two hispanic men in their teens were with the suspect and also on bikes.