Monday’s massive earthquake and powerful aftershocks have killed at least 3,419 people and injured another 20,534 in southeastern Turkey, Turkish Vice President Fuat Oktay announced during a press conference on Tuesday.

Meanwhile, at least 1,603 were killed and 3,649 injured in both government- and rebel-controlled areas of northwestern Syria, according to combined figures from the Syrian Ministry of Health and the Syrian civil defense and medical group that operates in opposition-held areas, known as the White Helmets.

-ABC News’ Nasser Atta, Engin Bas and Joe Simonetti

More than 24 hours after devastating earthquakes, ABC News reporters on the ground are witnessing the fevered effort to rescue survivors at a collapsed apartment building in southeastern Turkish city of Diyarbakir.

ABC News learned that crews had recently rescued a woman from what used to be an eight-story apartment building, where the top half now rests on three flattened floors below. The front wall had fallen away, exposing what used to be homes with furniture, pillows and air conditioning units.

In and around the collapsed building, there was a flurry of activity -- but then a moment when it all came to a grinding halt. Generators were turned off, everyone stopped talking and the block went silent. Search and rescue teams thought they may have found another survivor. It was quiet for several minutes, but then the urgent effort returns.

Rescuers continued working in the cold, wet weather while also facing the threat of aftershocks. None of that has deterred them. They know this is a race against time.

-ABC News’ Engin Bas, Ibtissem Guenfoud and Marcus Moore

The death toll continues to climb in Turkey and Syria 24 hours after the earthquake struck.

More than 4,300 people have died in the two countries following the devastating earthquake, officials said.

According to the Turkish Emergency and Disaster Management Organization (AFAD), 2,921 people have died in the country from the earthquake, with 15,834 people sustaining injuries.

Approximately 6,217 buildings have collapsed and about 7,840 people have been rescued from the debris and rubble, according to AFAD officials.

In Syria, 1,411 people have died since the earthquake struck the region, officials said.

-ABC News' Ellie Kaufman

President Biden called Turkish President Recep Tayyip Erdogan this afternoon, following the earthquake that caused devastation in Turkey and Syria, the White House said.

Biden extended condolences and "reaffirmed the readiness of the United States to provide any and all needed assistance to our NATO Ally [Turkey] in response to this tragedy," according to the White House.

"[Biden] noted that U.S. teams are deploying quickly to support Turkish search and rescue efforts and coordinate other assistance that may be required by people affected by the earthquakes, including health services or basic relief items," the White House said.

-ABC News' Ben Gittleson