A strong 6.7-magnitude earthquake has struck a lake near the Russia-Mongolia border.The quake was felt across northern Mongolia and woke people in the capital, Ulaanbaatar There were no immediate reports of injuries. Cracks appeared not only in many walls, but also in the thick ice which covers the country’s famous Lake Khuvsgul.

The earthquake struck at 5:33 a.m. local time on Tuesday and was centered on the lake.

Seismologists say the quake struck at a depth of just 10 km (6 miles) and was felt across the region on both sides of the border.

The area near the epicenter is not heavily populated but is home to a number of villages near the lake, including Hatgal and Turt, which have a combined population of up to 5,000 people.