Police have denied injuring a teenage motorcyclist, whose father claimed he was assaulted at a traffic roadblock.

Shah Alam deputy police chief Nek Zaidi Zakaria said police had discovered the boy - 16-year-old Mikail Quay - after he fell off his bike.

"We found him (after he fell) and then we called an ambulance. We did not ask him to push his bike to the roadblock, he pushed it on his own accord," Nek Zaidi told Malaysiakini.