Three motorcyclists were killed as their vehicle crashed into a roadside tree at Osmanpur in Mirsharai upazila yesterday noon. The deceased were identified as Arif Hosain, 20, son of Nurul Afsar, Ismail Hossain, 22, son of Muslim Uddin and Mehedi Hasan, 28, son of Shah Alam. Md Iftekhar Hasan, officer-in-charge of Jorarganj Police Station, said motorbike crashed into the tree around 12:30 pm, leaving two riders dead on the spot and another injured. Later, the injured died on the way to Chittagong Medical College and Hospital.