Strong tremors were felt across north India and parts of Nepal in the early hours of Wednesday after a 6.3-magnitude earthquake struck the Himalayan region near Uttarakhand's Pithoragarh along the Nepal border, killing at least six people and injuring five.

The National Centre for Seismology (NCS) said the epicentre of the 6.3-magnitude earthquake, which struck at 1.57 am, was in Nepal, about 90 km east-southeast of Pithoragarh. The region has been experiencing lower magnitude quakes for the last few days.