More than 130 prisoners are on the run in Mexico after a mass breakout from Coahuila jail close to the US border.
The inmates escaped through a tunnel dug out from the prison’s carpentry workshop to a perimeter fence.
The prison director and two other employees are being held over the incident at the facility in Coahuila, the state’s attorney general said.
A massive manhunt is under way, and the US authorities are on alert in case any escapees attempt to cross the border.
Some 132 men managed to escape from the prison in the city of Piedras Negras, which borders Eagle Pass in Texas to the north.
More than 130 prisoners are on the run in Mexico after a mass breakout from Coahuila jail close to the US border
One by one, the inmates fled through a tunnel measuring 2.9 m (9.5 ft) deep and 7 m long, attorney general Homero Ramos said in a statement broadcast on local TV.
The state government has offered rewards of 200,000 pesos ($15,600) for information leading to the arrest of each prisoner.
This is not the first time such a mass breakout has taken place in Coahuila, but it is by far one of the biggest in recent years.
Such events only go to underline further to the incoming government of President Enrique Pena Nieto the dire state of the prison system in Mexico.
Enrique Pena Nieto is to take office on 1 December. However, prison reform is not expected to be one of the main priorities of his government.
Those who ran Alcatraz liked to say nobody ever escaped alive, but that hasn’t stopped US marshals from continuing the search for three men who made it off the island 50 years ago.
According to the official version, Frank Morris, and the brothers John and Clarence Anglin were presumed drowned in the cold and choppy waters of San Francisco Bay.
There are plenty of people who think they did make it ashore and have been in hiding ever since.
Rumor had it they would return to the prison turned tourist spot on the 50th anniversary of their escape. Although it’s not certain where the urban myth began, US Marshal Michael Dyke spent the day on the island anyway, just in case.
Most prisoners who tried to flee “The Rock”, as it became known, were captured or killed or drowned.
But this was one of the most daring and intricate escapes in the notorious prison’s history – involving spoons, papier-mache heads and rubber raincoats.
According to the official version, Frank Morris, and the brothers John and Clarence Anglin were presumed drowned in the cold and choppy waters of San Francisco Bay
It began by digging away at the concrete around the air vents in their cells with spoons and a drill-like device fashioned from a vacuum cleaner.
Accordion practice muffled the sound of the drilling, and cardboard was carefully used to cover each hole as it grew. Soap became a substitute for removed rivets.
When the time came, they squeezed through into a utility corridor and headed for the roof.
Guards doing their rounds periodically checked on the faces of their prisoners. The three escapees appeared to be sleeping soundly, the guards were unaware they were papier-mache heads with real hair, harvested from the prison barber shop.
The three made it up to the roof, and despite the searchlights, headed over high barbed-wire fences.
At a watchtower blind spot they used improvised bellows to inflate a raft fashioned from rubber raincoats.
A fourth member of the gang had been unable to remove his air vent quickly enough, and by the time he broke through, the others had already cast off into San Francisco Bay – to their deaths or to freedom – depending on what you believe.
Remnants of the raft were found washed up on a nearby island, but the men were never seen again.
“I think there’s a good possibility that they survived,” US Marshal Michael Dyke says.
“It’s hard to say. We have to keep the case open since no bodies have been found, but about a month after they escaped in July 1962 a Norwegian freighter saw a body floating in the ocean 15 miles from the Golden Gate Bridge.
“He had on prison clothes – a navy pea coat and a light pair of trousers – similar to what prisoners wore. There were no other missing people during that time period.”
He thinks that may have been the body of Frank Morris, believing the Anglin brothers would have looked after each other.
But the uncertainty over their fate created a legend. Books and documentaries continued to question whether they drowned, or in fact made it to shore. Clint Eastwood played Frank Morris in the 1979 film Escape from Alcatraz.
One TV show re-enacted the escape in similar conditions and concluded they could have survived.
“I still receive leads once in a while regarding the case and there are still active warrants,” said Michael Dyke says. He has personally been investigating for almost 10 years.
“Because it’s an open case we have to go looking for them. Most leads aren’t really that good or credible. Generally 99 percent aren’t true.”
But along with a few relatives of the missing men, he went to the island for the day prepared to make an arrest if necessary on the 50th anniversary.
“Rumors start somewhere and nobody knows where they come from. There’s always a legend, but I don’t think it’s going to happen.”