GLASGOW, Scotland — At least one person is dead from the crash of a police helicopter onto a crowded Glasgow pub and the toll is expected to climb, officials said Saturday.

As specialist search and rescue teams continued to probe the wreckage of The Clutha pub, Chief Constable Stephen House confirmed overnight 32 people were taken by ambulance to hospitals in following the crash.

“Sadly at this time I can also confirm one fatality,” he told reporters. “We expect that number to increase over the coming hours.”

House said specialist teams are working to make sure everyone is recovered from the scene, where revelers were packed into the pub to hear a local band when the helicopter crashed through the roof.

Police couldn’t say whether people were still trapped inside the pub, but the hope is to find survivors, he said.

“Highly trained firefighters from all over Scotland are carrying out rescue operations at the scene,” House said. “They are continuing to make the building safe to allow full examination of the scene to ensure that everyone is recovered.”

Scotland’s leader Alex Salmond said it was a “black day for Glasgow and for Scotland.”

Police and air-safety investigators have begun inquiries, but say it is too early to say why the Eurocopter EC135 T2 helicopter — carrying two police officers and a civilian pilot — came down.

Authorities said they had made contact with people still inside The Clutha, where a band was performing when the helicopter came down. Search and rescue dogs were on the scene, along with more than 100 firefighters.

The crash Friday at around 10:30 p.m. local time sent dozens of patrons fleeing through a cloud of dust. Witnesses spoke of people streaming out of the building covered in blood, with gashes and other injuries.

As dawn broke, firefighters clambered on to the collapsed roof and pulled tarps over the wreckage of the helicopter. There was no word on the fate of those aboard.

Grace MacLean, who was inside the pub at the time, said she heard a “whoosh” noise and then saw smoke.

“The band were laughing, and we were all joking that the band had made the roof come down,” she told the BBC. “They carried on playing, and then it started to come down more, and someone started screaming, and then the whole pub just filled with dust. You couldn’t see anything, you couldn’t breathe.”

Retired firefighter Edward Waltham said he ran into the pub to help rescuers, and found one man covered in dust and apparently badly injured.