Reports from Papua New Guinea say one person is being held after a supermarket manager was fatally stabbed in Gerehu in Port Moresby yesterday.
Our correspondent says five armed people, dressed as security guards had entered the supermarket, where they were confronted by the store's own security.
The Bangladeshi supermarket manager was stabbed when he walked out of his office into the shopping area.
Three of the attackers were captured by police but two were later released.