( CNN ) -- The Israel Defense Forces arrested two people it identified as responsible for the massacre of an Israeli family in the West Bank settlement of Itamar , officials said Sunday . The two suspects , Amjad Awad . 19. and Hakim Awad , 28 , were caught in the nearby Palestinian village of Awarta , Israeli General Security Services said . Six others have been arrested for helping them . The pair are accused of killing Udi and Ruth Fogel and three of their children last month . The children were ages 11 years , 4 years and 3 months . The two men were members of the Popular Front for the Liberation of Palestine , but acted independently , the security services said . They decided on the attack a few days before the killings , the officials said . According to the investigation , the pair were unsuccessful in an initial attempt to acquire a gun , but on the night of the killings broke into an empty house in the settlement and stole an M-16 rifle . They entered the Fogel 's home and stabbed two of the children , before struggling with the parents and stabbing and shooting them , the security services said . They fled the house , fearing the shots would have been heard , but then returned to steal another weapon and stabbed the baby , the officials said . `` For the country , the fact that we promised and carried out the promise is witness to the fact that no such murder will ever leave our daily agenda , '' Israeli Prime Minister Benjamin Netanyahu said Sunday . `` We will get to such murderers whereever they are . This expresses our obligation to the idea of justice and our security . '' The IDF continues to search for more perpetrators of the killing of the Fogel family , an IDF spokesman said . `` The murders of five family members including a 3-month ( old ) baby constitute a crossing of all red lines , '' Lt. Col. Avital Leibovich said . `` The IDF has invested in numerous operational and intelligence efforts , and has worked closely with other security forces in order to find those responsible for this vicious murder . '' The day after the five members of the Fogel family were killed , Israel approved the construction of several hundred housing units in the West Bank . The government approved the construction in the settlements of Gush Etzion , Maale Adumim , Ariel and Kiryat Sefer in a rare Saturday-night decision . Three Fogel children survived , including a 12-year-old daughter who was not home , and two younger children whose room the killers apparently did not notice .
Israel arrested two suspects . They are accused of killing two members of a family of five . The IDF promised to investigate the case .