The two Newcastle University medical students stabbed to death on Borneo had been due to finish their training at the local hospital on Friday, according to local police.
Fourth-year students Neil Dalton and Aidan Brunger, both 22, were on the Malaysian part of the island on attachment to a hospital in Kuching.
Deputy police commissioner Datuk Dr Chai Khin Chung told the Malaysian State News Agency Bernama that the fight in which they were killed broke out after an argument in a bar over the students being too noisy.
He reportedly confirmed four men remain in custody after the 4.15am attack in the Jalan Padungan area of Kuching in the western province of Sarawak.
More top news
IKEA is recalling almost 36 million chests and dressers in the US and Canada after the deaths of three children.
Toyota is recalling 1.43 million cars for an airbag inflator defect.
Prime Minister insists the UK will maintain a strong relationship with Europe especially on trade and security, even after it leaves the EU.