LUXOR, Egypt – The terror lasted less than two minutes: Smoke poured from a hot air balloon carrying sightseers on a sunrise flight over the ancient city of Luxor, it burst in a flash of flame and then plummeted about 1,000 feet to earth. A farmer watched helplessly as tourists trying to escape the blazing gondola leaped to their deaths.

Nineteen people were killed Tuesday in what appeared to be the deadliest hot air ballooning crash on record. A British tourist and the Egyptian pilot, who was badly burned, were the sole survivors.

The tragedy raised worries of another blow to the nation’s vital tourism industry, decimated by two years of unrest since the 2011 revolution that toppled autocrat Hosni Mubarak. The southern city of Luxor has been hit hard, with vacant hotel rooms and empty cruise ships.

It also prompted accusations that authorities have let safety standards decline amid the political turmoil and infighting, although civil aviation officials said the balloon had been inspected recently and that the pilot may have been to blame, jumping out rather than stopping the fire.

Authorities suspended hot air balloon flights, a popular tourist attraction, while investigators determined the cause.

The balloon was carrying 20 tourists – from France, Britain, Belgium, Japan and Hong Kong – and an Egyptian pilot on a flight over Luxor, 320 miles south of Cairo, officials said. The flights provide spectacular views of the ancient Karnak and Luxor temples and the Valley of the Kings, the burial ground of Tutankhamun and other pharaohs.

According to initial indications, the balloon was in the process of landing after 7 a.m. when a cable got caught around a helium tube and a fire erupted, according to an investigator with the state prosecutor’s office.

The balloon then ascended rapidly, the investigator said. The fire detonated a gas canister and the balloon plunged about 1,000 feet to the ground, crashing in a sugar cane field outside al-Dhabaa village just west of Luxor, a security official said.

Both the investigator and the security official spoke on condition of anonymity because they were not authorized to talk to the media.

“I saw tourists catching fire and they were jumping from the balloon,” said Hassan Abdel-Rasoul, a farmer in al-Dhabaa. “They were trying to flee the fire but it was on their bodies.”

Amateur video taken from another balloon and shown on Al-Jazeera Mubasher television showed the balloon’s final moments.

Smoke is seen rising for several seconds from the gondola, silhouetted against the risen sun. The balloon itself catches fire with a flash, and in an instant, it bursts and falls as a fireball to the ground, trailing smoke. Egyptians on the balloon filming the scene can be heard crying and gasping in horror at the sight.

The bodies of the tourists were scattered across the field around the remnants of the balloon, as rescue officials collected the remains.

The crash immediately killed 18, according to Luxor Gov. Ezzat Saad. Two Britons and the pilot were taken to a hospital, but one of the Britons later died.

Among the dead were nine tourists from Hong Kong, four Japanese – including a couple in their 60s – two French, a Belgian and a second Briton, officials said, although there were conflicting reports on the nationality of the 19th victim.

The toll surpasses what was believed by ballooning experts to be the deadliest accident in the sport’s 200-year history: In 1989, 13 people were killed when their hot air balloon struck another over the Australian town of Alice Springs.

Luxor has seen crashes in the past. In 2009, 16 tourists were injured when their balloon struck a cellphone transmission tower.

After the 2009 crash, Egypt suspended flights for several months and tightened safety standards. Pilots were given more training, and a landing spot was designated.