Manila, June 23 -- The deadly shooting inside a classroom at San Jose National High School in Tacloban City that left three students dead and 20 others injured was planned for more than a month by the two suspects who are both minors, police said Tuesday.

Eastern Visayas Police chief Brig. Gen. Jason Capoy said investigators found that the 14- and 15-year-old suspects had been planning the attack since April or May.

"Based on our information, as early as May 1, kung hindi ako nagkakamali (If I'm not mistaken). April or May pa nilang pinagplanuhan (They had been planning for it since April or May)," Capoy said in a phone interview with Camp Crame reporters.

Capoy said three students - two female and one male - were killed in the attack...