Mie Prefectural Police are investigating a Hiroshima transport company's management system for health and safety following a tunnel accident that resulted in six fatalities.

More than 1,000 vehicles have been stranded near the Atal Tunnel outside Manali since Sunday night, after heavy snowfall and ice formation on roads brought traffic to a complete halt for the second consecutive day.

Snow clearance operations by the Border Roads Organisation (BRO) are underway at the South Portal as authorities work to restore movement along the route.

Heavy snowfall in Himachal Pradesh has led to the rescue of thousands of stranded tourists, with traffic through the Atal Tunnel suspended.