The police in Papua New Guinea are describing a violent attack on a trekking group as shocking and unthinkable.
In the assault on Tuesday in the Papua New Guinea highlands, two local porters were hacked to death, and a New Zealander and several Australian trekkers injured.
Superintendent Dominic Kakas says it was a slaughter.
"There was a point 3-0-3 rifle used, a home made fire, and four bush knives."
Dominic Kakas says the police are doing everything they can to capture the attackers including using a helicopter to search the area.
He says local villagers have also joined in the search.
The survivors of the attack are now back in Port Moresby.