A 13-year-old girl has been stabbed and six teenagers arrested on suspicion of attempted murder.
Humberside Police said she was found at the side of the A63 dual carriageway in Hessle at about 07:00 GMT.
She suffered “lacerations” to her neck, chest and abdomen and her injuries are “life-threatening”, the force said.
Four boys aged 14, 15, 16 and 17, and two girls aged 14 and 15 were arrested soon after in a wooded area nearby.