Police identified the fatality as resident Jerald Mirasol.
Corporal Eugene Ian Baylon, investigator of Police Station 3, said Mirasol was using his cellular phone on their balcony when Rolly Domingo, 48, and his 19-year-old son Brix attacked him using bladed weapons.
The victim sustained multiple stab wounds. He was brought to the Corazon Locsin Montelibano Memorial Regional Hospital, but he did not survive.
Baylon said the suspects fled on board a motorcycle.
He said they are eyeing grudge as a possible motive in the killing of the victim, adding that the suspects were renting from the house of the victim.
Baylon said they are still conducting follow-up operation to arrest the suspects.*