Vancouver Coastal Health says accused mass killer Kai-ji Adam Lo was under the care of a mental health team and on leave from hospital at the time of Saturday’s deadly festival attack in southeast Vancouver.

The Vancouver man accused of murdering eight people by ploughing a vehicle into a crowded street celebration on Saturday night had been grappling for months with the impact of his brother's murder.

Nepal will issue Everest permits only to climbers with experience of scaling at least one of the Himalayan nation's 7,000-metre (22,965 ft) peaks, according to the draft of a new law aimed at reducing overcrowding and improving safety.