Over the course of two hours, hundreds of civilians came to fill containers with gasoline from a gusher shooting 20 feet (six meters) into the air.
The war against fuel theft was a theme repeated by people in Tlahuelilpan, which is crossed by pipelines and located just a few miles from a refinery.
"A lot of innocent people came here, perhaps their vehicle didn't have enough gasoline for tomorrow, and they said, "I'm just going to go for a few litres", said farmer Isidoro Velasco, 51. Screaming people ran from the flames, some themselves burning and waving their arms.
Lopez Obrador says his decision to shut down pipelines to combat crime has greatly reduced theft.
Governor Omar Fayad said at least 76 others are injured. He added that some of the most badly injured minors could be moved to Texas in the United States for further treatment.
And another pipeline burst into flames in the neighbouring state of Queretaro, but the Mexican army reported nobody was hurt.
The Hidalgo state prosecutor said 54 of the dead could not be readily identified, and require DNA analysis.
In a statement, state oil company Pemex said the explosion was caused by illegal taps in the pipeline.
Lopez Obrador said the disaster had hardened his resolve to fight fuel theft and the government was looking at ways to strengthen aging pipelines to make it harder to illegally suck fuel from them.
"We are going to find those responsible for actions that generated this tragedy", he said.
Fortnite bug gave hackers access to millions of accounts
The Verge , however, pointed out that although 2018 turns out to be a huge year for Epic Games, it shouldn't be surprising. They may also add two-factor authentication to the account, so that you can't even guess a password.
There's A Power Rangers Fighting Game Coming In April
Although the characters in the reveal trailer are all classic Power Rangers , there will be DLC characters joining the roster. Pre-orders for the console versions are now live on the game's website and include a bonus Green Ranger V2 Skin.
Piers Morgan criticises Prince Philip’s "arrogant" behaviour after vehicle accident
The prince emerged from the accident shaken but unhurt, while the driver of the auto that he plowed into suffered a broken wrist. Buckingham Palace announced the next morning that Philip, despite not being injured, had been taken to hospital for a check-up.
Forensic specialists in white suits worked among the charred, blackened corpses at the scene, which was guarded by soldiers as the pungent smell of fuel hung in the air. He rejected suggestions the incident was linked to his policy.
"Mexico needs to end corruption", Lopez Obrador said.
Pemex's Chief Executive Officer Octavio Romero said there had been 10 illegal fuel taps in the same municipality in the last three months alone.
Military personnel watch as flames engulf an area after a ruptured fuel pipeline exploded, in the municipality of Tlahuelilpan, Hidalgo, Mexico, on January 18, 2019, in this handout photo provided by the National Defence Secretary (SEDENA). "But they don't understand".
At an early morning press conference he said that the office will open an investigation to determine whether the explosion was intentional - caused by an individual or group - or whether the fireball occurred due to the inherent risk of clandestine fuel extraction from ducts.
Mexican media published graphic pictures of victims from the blast site covered in burns and shorn of their clothes.
Some locals criticised security forces at the scene for not warning people more forcibly to get away from the leaking fuel. "It was like a party...for a moment you could even hear how happy people were". "I rushed to help people", said Fernando Garcia, 47.
"Some people's skin came off".
After the blast, "They shouted the names of their husbands, brothers, their family members", she recalled, of people searching for loved ones.