More than 100 people have been killed after a powerful earthquake struck a remote region of Tibet on Tuesday morning, with tremors felt across the Himalayas in neighboring Nepal, Bhutan and parts of northern India.

More than 400 people trapped by rubble in earthquake-stricken Tibet have been rescued, Chinese officials said on Wednesday, with an unknown number still unaccounted for in freezing weather a day after a strong tremor rocked the Himalayan foothills.

Rescue workers in the cold, high-altitude Tibet region in western China searched for more survivors and victims Wednesday, one day after a strong earthquake leveled thousands of houses and killed at least 126 people.