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.

Richard Le, 47, Linh Hoang, 30, and five-year-old Katie Le were killed when an SUV plowed into a crowd of people at the festival held to celebrate Filipino culture and community.

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.