Update: Joshua has been found safe and well.
Police are appealing for help to find a vulnerable teenager from Grimsby.
Joshua Eccleston, 16, was last seen riding his black mountain bike around the Sheraton Drive area of Humberston at around 1.20pm today.
Officers said Joshua does not normally go outside of the street where he lives, so he may now be worried about being away from home.
A spokesperson added that he can be friendly but his speech is not always clear.
He is wearing a maroon t-shirt and shorts.
Anyone with any information should call 101 quoting 270 of August 4.