BANGKOK (AP) -- The death toll from Myanmar's powerful 7.7 magnitude earthquake keeps climbing amid rescue efforts.

The military government said Saturday that 1,644 people have been killed, with thousands of others injured and dozens missing.

The earthquake struck midday Friday, followed by several aftershocks, including one that measured 6.4.

In Thailand, the quake rocked the greater Bangkok area, leaving 10 people dead.

Several countries, including Malaysia, Russia and China have dispatched rescue and relief teams.

Here is the latest:

Myanmar's ruling military said on state television that the confirmed death toll from the 7.7 magnitude earthquake increased to 1,644.

The new total is a sharp rise compared to the 1,002 total announced just hours earlier. The number of injured increased to 3,408, while the missing figure rose to 139 from Friday's quake.

Russia has sent a medical team to Myanmar to care for earthquake victims, a Health Ministry official said.

According to Alexey Kuznetsov, the medics include specialists in infectious diseases, resuscitation and traumatology.

Separately, Russia's Emergencies Ministry said that two planes carrying Russian rescue workers have landed in Myanmar's largest city, Yangon.

Earlier, the ministry reported that a mission, including search and rescue teams, canine units, anaesthesiologists and psychologists, was on its way to the disaster-stricken country.

The ministry said that its rescue teams are equipped with "endoscopes and acoustic devices for searching for people in rubble up to 4.5 meters (nearly 15 feet) deep, as well as ground-penetrating radars and thermal imagers."

Hong Kong sent a group of 51 search-and-rescue personnel to help with earthquake relief efforts in Myanmar. The group includes firefighters and ambulance personnel as well as two search-and-rescue dogs, among others.

The group brings along nine tons (18,000 pounds) of equipment including life detectors and masonry cutting machines, as well as an automatic satellite tracking antenna system that provides network connection, according to a statement on the Hong Kong government's website.

Satellite photos from Planet Labs PBC analyzed by The Associated Press show the earthquake toppled the air traffic control tower at Naypyitaw International Airport.

The photos taken Saturday show the tower toppled over as if sheered from its base. Debris lay scattered from the top of the tower, which controlled all air traffic in the capital of Myanmar.

It wasn't immediately clear if there had been any injuries in the collapse, though the tower would have had staff inside of it at the time of the earthquake Friday. It likely also stopped air traffic into the international airport, given all electronics and radar would have been routed into the tower for controllers.

Flights carrying rescue teams from China have landed at the airport in Yangon instead of going directly to the airports in the major stricken cities of Mandalay and Naypyitaw.

A spokesperson for the China International Development Cooperation Agency said that Beijing will provide Myanmar with 100 million yuan ($13.8 million) in emergency humanitarian aid for earthquake relief efforts.

An additional rescue team of 82 people left Bejing, hours after a different team of emergency responders from the Chinese province of Yunnan, bordering Myanmar, arrived in the earthquake-stricken country.

Additionally, 16 members of the Chinese civil relief squad Blue Sky Rescue Team in the city of Ruili, Yunnan, departed to Muse City in northern Myanmar to help with relief efforts, according to state broadcaster CGTN. Chinese authorities also sent a first batch of 80 tents and 290 blankets.

Meanwhile, Chinese President Xi Jinping extended condolences to Myanmar's leader Min Aung Hlaing.

The earthquake was felt in parts of China's Yunnan province, though casualties were limited. Two people in Ruili suffered minor injuries and 847 homes were damaged, according to authorities. Some high-rise buildings and older houses in urban areas were also partially damaged, but power and water supplies and transportation and communications lines have been restored.

New Zealand Foreign Minister Winston Peters says that his government will support relief efforts "via the International Red Cross Movement."

"Our thoughts are with all those who have lost loved ones, and to everyone else affected," Peters posted on X.

South Korea will send the aid through international organizations to support recovery efforts following the recent earthquake.

The Foreign Ministry stated on Saturday that Seoul will closely monitor the situation and consider additional support if needed.