Jakarta. November 19, 2005. Indonesian police said Saturday they have arrested a 23-year-old man on suspicion of involvement in the beheading of three teenage Christian girls in the religiously-divided district of Poso. Police arrested Irfan Masuro in Poso in Central Sulawesi province last Sunday, said national police spokesman Sunarko Danu Ardanto. Machete-wielding attackers ambushed the three high school students on their way home on October 29, killing three and wounding the fourth, police said. Two of the victims` heads were found near a police post while the third was discovered outside a Christian church. The incident has sparked public indignation at home and overseas. President Susilo Bambang Yudhoyono condemned the killings and Pope Benedict XVI deplored what he described as "barbaric murder." The latest arrest was made after police found blood stains on a bayonet of Masuro`s that matched samples from one of the slain girls, Ardanto said, adding that Masuro was the fourth suspect so far detained for the killings.