A 4.9-magnitude earthquake struck the Sikkim-Nepal region early Thursday morning, triggering mild tremors in parts of West and East Sikkim, including the state capital Gangtok. No casualties or property damage had been reported at the time of filing this report, officials said.

The earthquake occurred at 4.30 am, with its epicentre located around 40 km northwest of Yuksom in Gyalshing district of West Sikkim, according to the National Centre for Seismology (NCS).