Image copyright Getty Images Image caption The bus was being escorted through a mountainous area at the time of the crash
At least 19 people have been killed and dozens injured after a bus carrying passengers hit a rock in central Mexico.
The bus, which was travelling from Ciudad Acuna to San Luis Potosi, was travelling through a mountainous area and collided with a truck, AFP reports.
On Friday morning, firefighters, ambulances and military personnel spent more than six hours removing the victims, many of whom were burned beyond recognition.
The bus driver survived the crash.
The victims were from three Mexican states: Nuevo Leon, San Luis Potosi and Hidalgo.
Search and rescue work is ongoing, and authorities say the death toll could rise. The possibility of further human remains may be contributing to the slow recovery of bodies.
Image copyright AFP Image caption Dramatic images from the scene on Friday showed the bus engulfed in flames
Victims were airlifted to San Luis Potosi and San Luis Pass hospitals.
Twenty-two of those injured were hospitalised in San Luis Potosi, while the other seven were from other central Mexico states.
Twenty-three people, including the bus driver, escaped after the crash which occurred at 1300 GMT (1400 BST) on Thursday.
The motorway where the accident occurred – which connects Mexico City to Acapulco and four other northern Mexican states – is in a mountainous area where many of the roads are poorly constructed and have no proper markings.
In June, a governor in San Luis Potosi urged the federal government to suspend construction of roads on the route.
This is the latest road accident to hit Mexico.
There were 144 deaths on Mexico’s highways in 2017.
Image copyright Reuters Image caption A view of the remote area where the bus crashed
In 2015, 195 people died when a truck veered off a road in the country’s north-west and hit a bus on the same route.