AT LEAST 15 people were killed late on Tuesday after debris from a massive landslide hit a bus in India's northern state of Himachal Pradesh, local authorities said.

The bus was traveling on a hilly stretch near Bilaspur district when a landslide struck following days of torrential rains. There were at least 20 to 25 passengers on the bus at the time. Nine men, four women and two children were among those killed, police said.

Three injured children were rescued and admitted to a local hospital for treatment, according to a statement from the office of Sukhvinder Singh Sukhu, the state’s highest-elected official.

Rescue operations continued today to find other missing passengers who are believed to be dead, police said.

Intermittent rains have lashed the region since Monday, making the fragile mountain slopes unstable.

President Draupadi Murmu and Prime Minister Narendra Modi offered their condolences following the deadly landslide.

Extreme rains this year have caused flooding and landslides across the south Asian region, which includes India, Pakistan, Bangladesh, Bhutan, Sri Lanka, Afghanistan, Maldives and Nepal.

Experts say human-caused climate change is intensifying south Asia’s monsoons, which traditionally run from June to September and again from October to December.

The rains now arrive in erratic bursts that dump extreme amounts of water in short periods, followed by dry spells.