SCHOHARIE, N.Y. — The supersized limousine that crashed and killed 20 people outside a country store failed a safety inspection last month and shouldn’t have been on the road, and the driver wasn’t properly licensed, New York’s governor said Monday.

The state moved to shut down the owner, Prestige Limousine, as state and federal authorities investigated the cause of Saturday’s wreck in Schoharie.

The crash about 170 miles north of New York City came three years after another deadly stretch-limo wreck in New York state spurred calls for Gov. Andrew Cuomo to examine such vehicles’ safety. It was not clear whether the state took any steps to do so.

As victims’ relatives tried to come to grips with the tragedy that happened as a group of friends and family were on their way to a 30th birthday celebration, authorities had yet to say how fast the limo was going, whether its occupants wore seat belts or what caused the vehicle to run a stop sign.

Investigators were conducting autopsies, including on the driver, to see if drugs or alcohol were factors, and the National Transportation Safety Board was also looking into whether the limo had any mechanical problems.

But officials already saw some red flags, Cuomo said: The driver didn’t have the necessary commercial license, the limo had been cut apart and lengthened in a way Cuomo said violated federal law, and the vehicle failed a state inspection that examined such things as the chassis, suspension and brakes.

“In my opinion, the owner of this company had no business putting a failed vehicle on the road,” the governor said while attending a Columbus Day Parade in New York City. “Prestige has a lot of questions to answer.”

A call to Prestige Limousine’s office in Gansevoort went unanswered. Federal records show the company has undergone five inspections in the past two years and had four vehicles pulled from service.

The limousine, built from a 2001 Ford Excursion, ran a stop sign at an T-shaped intersection at the bottom of a hill and slammed into an unoccupied SUV at the Apple Barrel Country Store and Cafe, a popular stop for autumn leaf-peepers.

The wreck killed two pedestrians and all 18 people in the limousine, including four sisters who were headed with friends and relatives to a brewery for a party for one of the sisters.

The four sisters’ aunt, Barbara Douglas, said they had felt “they did the responsible thing getting a limo so they wouldn’t have to drive anywhere.”

“My heart is sunken. It’s in a place where I’ve never felt this type of pain before,” said Karina Halse, who lost her 26-year-old sister Amanda.

A vigil was planned Monday night in Amsterdam, where some victims lived.

The crash appeared to be the deadliest land-vehicle accident in the U.S. since a bus full of Texas nursing home patients fleeing 2005’s Hurricane Rita caught fire, killing 23. Saturday’s wreck was the nation’s deadliest transportation accident of any kind since a 2009 plane crash near Buffalo, New York, killed 50 people.

Limousines built in factories are required to meet stringent safety regulations. But luxury cars that have been converted to limos like the one in Saturday’s crash often lack certain safety components, such as side-impact air bags, reinforced rollover protection bars and accessible emergency exits.

There are few federal regulations governing limos that have been modified after leaving the factory. Regulations often vary by state and even local governments.

“It certainly is the Wild West out there when it comes to limousines and stretch vehicles,” said National Safety Council CEO Deborah A.P. Hersman, who would like to see uniform state limousine regulations across the nation.

Ford said it has never made its own stretch version of the Excursion SUV. The automaker has a program that certifies companies that modify vehicles to Ford specifications, but it was unclear whether the limo in Saturday’s crash was altered by one of those companies.

There were 12 wrecks — and a dozen crash deaths — involving large limos from 2012 to 2016, according to the National Highway Traffic Safety Administration. That compares with over 157,000 crashes and over 171,000 deaths involving all types of vehicles during that period.

But some big-limo wrecks caught the public’s attention and prompted pleas for more oversight.

Five women out for a bachelorette party were killed in 2013 when their stretch limo caught fire in Northern California because of friction between the drive shaft and the rear floorboard. After a stretch limousine was T-boned and nearly torn in half on New York’s Long Island in 2015 — killing four women on a winery tour — a special grand jury implored Cuomo to examine the safety of such vehicles.

It appears the task force was never formed, and nearly three years after the grand jury’s recommendation, it was unclear what, if anything, Cuomo’s administration did in response.

“I don’t know if there was a task force set up,” the governor said Monday, while suggesting that Saturday’s crash didn’t necessarily point to a need for more regulation.

“Sometimes, people just don’t follow the law” that already exists, he said. “And that may very well be what happened here.”

The New York grand jury report recommended state lawmakers require stretch limousines that seat nine or more passengers to meet the stricter inspection regulations that apply to buses.

Lawmakers, including Democratic Sen. Chuck Schumer of New York, asked federal officials several years ago to implement higher safety standards for stretch limos modified after leaving the manufacturer.