Damaged buildings at Kalbay National High School in Jose Abad Santos, Davao Occidental. He added that at least three other schools suffered heavy damage aside from Kalbay National High School in Barangay Kalbay. These were Fontanares High School at Barangay Sugal and Guillermo High School at Barangay Nuing. Kalbay National High School (KNHS), whose structures all suffered heavy damage during the June 8 magnitude 7.8 earthquake, had already damaged structures crumbling further with each aftershock. At Kalbay National High School in Jose Abad Santos, Davao Occidental.