(Cannon Beach, OR) -- An 18-year-old student from Beaverton's Mountainside High School remains missing after an incident Friday afternoon. Jacob Stokes was swimming with three other friends at Cannon Beach when they were lost from sight. Two students were able to swim to shore on their own. A rescue swimmer rescued the third student. A search continued on Sunday. The principal of Mountainside High School sent a note to parents saying Stokes died in a tragic swimming accident. Additional counselors are being brought in on Monday to help students with the loss.