They said members of one gang had been taunting their rivals, who then set fire to the mattresses in the cell holding those taunting them.

Videos posted on social media showed a huge cloud of grey smoke rising from the women’s prison, which is located about 25km north of the capital, Tegucigalpa, and holds approximately 900 inmates.

While the warring factions are locked up in different parts of the jail, the wings are located close to each other.

The unrest broke out early in the morning local time on Tuesday.

Survivors said that many of those who died had been seeking refuge from the flames in a bathroom. Their burnt bodies were found piled on top of each other.

Others were shot dead and stabbed by gang members in the corridors and a prison courtyard.

Some of the victims are not thought to have been linked to either of the two gangs but were caught up in the incident.

Among them is a former police cadet who was serving a 15-year prison sentence after confessing to killing a fellow police officer.

Another of those killed was only days away from being released after serving her sentence for kidnapping.

Honduras is known for corruption and gang violence, which have infiltrated government institutions and seen the homicide rate soar.

Along with neighbours El Salvador and Guatemala, the country is a major transit route for cocaine coming from South America to the United States.

It also has a history of deadly prison riots, which are often linked to organised crime.

At least 18 people were killed in gang violence at a prison in the northern port city of Tela in 2019.

Earlier last week, search teams had found a child’s drinking bottle, a pair of scissors and a hair tie, as well as what appeared to be a makeshift shelter made from branches and a half-eaten passion fruit.

The children belong to the Huitoto indigenous group and members of their community have expressed the hope that their knowledge of fruits and jungle survival skills will have given them a better chance of surviving the ordeal.

But despite more than 100 soldiers combing the jungle, no further traces were found until the early hours of Wednesday.

The latest items were spotted by an indigenous woman some 500m (1,640ft) from the crash site.

She found a dirty nappy, a green towel and shoes, which judging by their size are thought to belong to the second youngest of the missing siblings, who is four years old. The nappy is believed to have been worn by the 11-month-old baby.

At a separate location, the search team found another nappy, a mobile phone case and a pink cap which matches the drinking bottle found last week.

Indigenous people have joined the search and helicopters have been broadcasting a message from the children’s grandmother recorded in the Huitoto language urging them to stay put and to stop moving so as to make them easier to locate.