YANGON / MANDALAY, Myanmar - The death toll from Friday's 7.9-magnitude earthquake in Myanmar has risen to 2,056, with approximately 3,900 people injured and nearly 270 reported missing, according to the country's State Administration Council Information Team on Monday.

International and domestic rescuers have been racing against time to save more lives in the quake-affected areas as the country's Department of Meteorology and Hydrology reported that 36 aftershocks, with magnitudes ranging from 2.8 to 7.5, have occurred as of Monday morning.

Myanmar's State Administration Council Chairman Senior General Min Aung Hlaing announced a week-long mourning period.

In recognition of and sympathy for the damage and loss of lives caused by the earthquake, the period from March 31 to April 6 has been declared as national mourning days. During this time, the national flag will be flown at half-mast, he said.

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In Bangkok, Thailand's capital, emergency crews using cranes and dog sniffers on Monday continued a desperate search for 76 people believed buried under the rubble of an under-construction skyscraper that collapsed.

Bangkok Governor Chadchart Sittipunt said rescuers are not giving up despite the conventional-wisdom window for finding people alive fast approaching.

"The search will continue even after 72 hours because in Türkiye, people who have been trapped for a week have survived. The search has not been cancelled," Chadchart said.

He said machine scans of the rubble indicated there may still be people alive underneath, and dog sniffers are being dispatched to try to pinpoint their locations.

"We've detected weak life signs and there are many spots," he said.

Thailand's official death toll was at 18 on Sunday, but could shoot up without more rescues at the collapsed building site.

The United Nations said it was rushing relief supplies to estimated 23,000 quake-hit survivors in central Myanmar.

"Our teams in Mandalay are joining efforts to scale up the humanitarian response despite going through the trauma themselves," said Noriko Takagi, the UN refugee agency's representative in Myanmar. "Time is of the essence as Myanmar needs global solidarity and support through this immense devastation."

Myanmar faces a humanitarian crisis following the quake and the country's aid needs are increasing by the hour, Red Cross officials said on Sunday.

Friday's quake, one of the strongest to hit Myanmar in a century, has damaged infrastructure including bridges, highways, airports and railways - hampering rescue efforts in the Southeast Asian nation.

"This is not just a disaster; it is a complex humanitarian crisis layered over existing vulnerabilities," Alexander Matheou, regional director for Asia Pacific at the International Federation of Red Cross and Red Crescent Societies, said in a statement.

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"The magnitude of this disaster is substantial, and the need for support is urgent," he added.

Foreign rescue teams arrived in Myanmar on Sunday to help the country cope with the disaster, and the Red Cross of Myanmar said volunteers were administering first aid and distributing items such as blankets, tarpaulins and hygiene kits.

"The destruction has been extensive, and humanitarian needs are growing by the hour," it said in Sunday's statement.

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The IFRC has launched an emergency appeal for 100 million CHF ($113.60 million) to assist 100,000 people with life-saving relief and early recovery support.

Also on Sunday, Bangladesh dispatched emergency relief aid to Myanmar. Following the direction of Chief Adviser of the interim government Muhammad Yunus, the Bangladesh Armed Forces have been mobilized to send rescue and medical assistance teams to Myanmar. 

Essential relief supplies, including medicines, tents, and food, are being provided to support the affected population.

According to a statement issued by the Inter-Services Public Relations (ISPR) of the Bangladesh Armed Forces on Sunday evening, two aircraft landed at Yangon airport on that day.

The ISPR emphasized that, subject to approval from the Myanmar government, additional relief supplies and a larger rescue and medical assistance team will be deployed later.

In preparation for further relief operations, a specialized 26-member search and rescue team from the Bangladesh Armed Forces, along with a 10-member rescue unit from the Fire Service and Civil Defense, remains on standby to provide necessary assistance for the rescue operation.

Additionally, two medical teams of 11 members each were on standby to provide medical services.

On Saturday, the UN Office for the Coordination of Humanitarian Affairs said aid operations were being hindered by damaged roads and that hospitals in central and northwestern Myanmar were struggling to cope with the influx of people injured in the earthquake.