More than 120 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.

BEIJING — A strong earthquake shook a high-altitude region of southwestern China and areas of Nepal on Tuesday, damaging hundreds of houses, littering streets with rubble and killing at least 126 people in Tibet. Many others were trapped as dozens of aftershocks shook the remote region.

At the time of publishing, there are at least 130 injured and more than 1,000 homes destroyed by the earthquake. Relief will be complicated and long in coming, because the local population mainly lives in small, isolated villages, at altitude, and therefore difficult to access.