A major earthquake has struck the US state of Mexico, killing at least 50 people and injuring more than 3,000.
The quake was felt in Texas, Arizona and New Mexico.
Here’s what you need to know.
1:00 Mexico’s Mexico City city is the epicentre of the quake, with buildings, roads and schools damaged and dozens missing in the capital.
The epicentres of the quakes have not yet been confirmed.
More than two hours after the quake hit, rescuers were still trying to reach the injured.
President Enrique Peña Nieto said the quake’s epicentral pressure of 6.5-7 on the Richter scale was the strongest ever recorded in the United States.
He added: “I have no doubt that we will get stronger.”
According to US Geological Survey (USGS), the quake was centred about 25km (15 miles) east of Mexico City.
Mexico City is located on the border with Texas and New Jersey.
It is a major city with about 1.3 million residents.
The USGS has not yet officially reported the death toll.
A state of emergency has been declared in the western state of Chiapas, the home state of Donald Trump, the US president who won the election in November.
The state of Texas said on Twitter it was “at a complete loss” to understand how and why a magnitude-8.2 earthquake struck the capital city of Mexico on Sunday, the deadliest earthquake to hit the US in decades.
More: US officials said the cause of the temblor, which happened at around 4:30am local time (1430 GMT) on Sunday (local time), was still being investigated.
However, US President Donald Trump told reporters in New York on Monday that the US was “going to get better and we’re going to get stronger”.
He said the US had been dealing with a “very severe and significant” earthquake.
“We’re going get stronger, and we are going to win.
I think that’s the message,” he added.
A magnitude-7.2 quake was recorded in Texas last week, which also killed at least 18 people and injured more than 400.
In 2016, a magnitude 7.2 temblour struck Mexico’s capital, Mexico City, killing more than 30 people and causing more than $1 trillion in damage.
The country recorded more than 2,300 aftershocks in 2016, according to the US Geological Services.
On Sunday, an earthquake measuring 6.4 magnitude hit a mountainous region in southern Mexico, a remote and rugged region where mining is still prevalent.
The temblors were the biggest to hit Mexico since 2006, when a magnitude 6.3 tembloise hit the country’s capital.