A passenger train crashed into a maintenance train in Buenos Aires on Friday, sending nearly 60 people to hospitals in the Argentine capital, including two in serious condition with head injuries, officials said.

The accident took place around 10:30 am (1330 GMT) in the suburb of Palermo, when the seven-car passenger train collided with a maintenance train on the tracks of a railway bridge.

"The locomotive and first passenger car derailed," the state-owned Trenes Argentinos (TA) railway company said in a statement.

Emergency authorities reported 30 people taken to hospitals after the crash, but city health officials updated that figure to 57 at the end of the day.

Two seriously injured victims suffered head trauma and were airlifted to hospitals by helicopter, emergency service official Alberto Crescenti said.

The majority of the other victims had been discharged by Friday evening, he added.

News photographs showed a train carriage ripped open at one end and tilted against the metal railings of the railway bridge. It was unclear if it was a carriage of the passenger or maintenance train.

The impact "was very strong," a passenger in the last car told the TN news channel. "One person was thrown against the door, many people were thrown to the ground."

"It is a miracle we are alive," cried another passenger, as he leaned out of the window filming the accident scene, in images broadcast on several stations.

Transport Minister Franco Mogetta said there were "multiple hypotheses" about what had happened, including whether something had gone wrong with the signaling system.

He mentioned complaints of "cable theft" amid a sharp rise in the pilfering of copper cables and those made of other metals, in a country where year-on-year inflation stands at almost 290 percent and 42 percent of the population lives in poverty.

The leader of the train drivers' union, Omar Maturano, slammed the "definancing" of Trenes Argentinos under budget-slashing President Javier Milei's government.

"There are thefts of signaling cables. We have been asking for repairs for 10 days, but there are no spare parts for the signaling, or for the trains. We are told that there is no budget."

At least 34 people, including two babies were killed when a contraband fuel depot exploded into flames in southern Benin near the border with Nigeria on Saturday.

According to Beninese Interior Minister Alassane Seidou, “a serious fire occurred in the town of Seme Podji. Another 20 people were seriously wounded in the incident.”

"I can't really give you the cause of the fire, but there is a large gasoline warehouse here and cars, tricycles and motorcycles come from morning to evening,” he added.

Nigeria is a main oil and gas producer where fuel smuggling is very common along its borders, particularly when the government maintains a subsidy to keep fuel prices low.

The majority of the victims were burnt and they could not be not be identified.

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