A Norwegian has been arrested for allegedly threatening to kill his flatmate after his wife fell from the third floor of a Discovery Bay apartment. Police said the Uzbek woman, 26, accidentally fell from a bedroom balcony in Crestline Mansion, Siena One Drive, early yesterday. She suffered head and arm injuries and was in a stable condition in hospital. The man, 35, identified only as Fredrick, was arrested for criminal intimidation. Police said he threatened the man renting the flat, a British teacher called Paul, about the same time as the Norwegian's wife fell off the balcony. Police believe the recently married couple were drunk at the time of the incident. An officer said there was no sign of struggle or fighting. 'It is possible that she climbed on a table on the balcony and fell,' the officer said. 'No evidence suggests she was pushed.' The couple arrived in Hong Kong in July and got married last month. They shared an apartment with the teacher, 44, in Discovery Bay. Police said the couple had been drinking heavily during recent celebrations and often argued over their accommodation problems. They appeared to be drunk when they returned to the apartment just after midnight yesterday. They had a quarrel in their bedroom while the teacher was smoking in the kitchen. Fredrick went to the kitchen and picked up a knife before allegedly threatening to kill the teacher. He then dropped the knife and left the kitchen. 'The victim was not too frightened because the suspect was under the influence of alcohol,' a police spokesman said. A security guard found Fredrick's wife lying semi-conscious on the ground. Fredrick was being questioned last night and had not been charged.