Papua New Guinea police have arrested two suspects and have identified two others following an attack on an elderly expatriate woman in Madang town last week.
The police say five men broke into the home of the 70-year old long term resident, and attacked and raped her before ransacking the house.
The incident prompted the local government to introduce a ban on the sale of alcohol and to plan the eviction of illegal squatters.
It is also thinking of imposing a curfew.
Chief inspector, Anthony Wagambie, says they have charged two men so far.
"We were able to identify two suspects who are alleged of being prime suspects involved in this crime. Over the weekend we they have been charged with armed robbery and rape. They are still in custody. There are another two suspects who's identity has been discovered. Our investigators are working around the clock to find out where they are and have them arrested as well."
Anthony Wagambie says the fifth man's identity is still unknown.