(KAIR)--An Atchison teen is missing, with the public alerted to notify authorities if they know his current location.

That word comes from the Kansas Missing and Unsolved website, which says 16-year-old Andrew Sinclair has been missing since Sunday.

He's described as white with brown hair and blue-green eyes, weighing 220 lbs and standing 6'2". He wears black framed eye glasses.

According to the Missing and Unsolved website, Sinclair was given a ride to a convenience store on the south side of Saint Joseph, Missouri, where he was dropped off around 9:00 Sunday morning. Sinclair had a light green bicycle with him at that time.

On Monday, the website posted an update to the original information, saying Sinclair had been spotted that afternoon around 2:00 on I-29, near Platte City, Missouri. It's believed he is enroute to Kansas City. 

Anyone with information regarding Sinclair's whereabouts is urged to contact police at (913) 367-4323.