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Rescue workers in Glasgow, Scotland, tend to the scene Saturday, November 30, where a police helicopter crashed into the Clutha Bar.

Emergency workers sift through wreckage. At least eight people have been killed and 14 seriously injured since a police aircraft crashed into a downtown pub.

Rescue workers search for survivors inside the pub.

Emergency crews arrive at the scene of the crash.

Police markings can be seen on some of the helicopter wreckage.

Emergency workers inspect the roof of the pub.

Emergency workers gather near the scene of the crash.

The helicopter, carrying two police officers and a civilian pilot, crashed on the roof of the pub at 10:25 p.m., according to Scottish police.

Emergency responders work on the wreckage on top of the pub.

A spokesman for the Scottish Ambulance Service said there were "multiple ambulances and a special operations team on site."

The crash occurred as patrons listened to the self-styled ska band Esperanza, which had taken the stage at the pub a short time earlier.

Witnesses reported seeing people who appeared injured running from The Clutha pub after the crash.

Rescue workers gather near the scene of the crash.

The helicopter continued to smolder hours after the crash.

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(CNN) -- Eight people are confirmed dead after a police helicopter crashed into the roof of a pub in central Glasgow, Chief Constable Stephen House of Police Scotland said Saturday.

Three of the dead were the crew of the helicopter, House said, while the remaining five were people found in the building.

Fourteen people remain seriously injured in Glasgow hospitals, House said. Earlier, police said 32 in total were taken to local hospitals.

The helicopter crashed into the pub as it was packed with Friday night customers. The search for survivors continued overnight into Saturday.

House said the rescue and recovery operation was "very sensitive" and would continue for many days yet.

"You can imagine the terror of the situation when a helicopter came through the top of the building -- there were well over 100 people (there)," he said, as he praised those who helped pull the injured from the rubble.

Police won't know the final situation until the helicopter can be removed from the building, he added.

Chopper crashes into packed pub, 1 dead

Witness: I started screaming

Witness: It was a scene of devastation

The head of the Scottish government, First Minister Alex Salmond, said it was a "black day for Glasgow and for Scotland."

But, he said, people should take heart from the swift response of emergency responders and the "instinctive courage of ordinary Glaswegians" in the face of adversity.

"As First Minister, it's a day we can take great pride in how we've responded to this extraordinary tragedy," he said. Salmond added that Saturday is St. Andrew's Day, Scotland's national day.

Prime Minister David Cameron extended his deepest sympathies to those who lost loved ones, and he praised emergency responders and "the bravery of ordinary Glaswegians who rushed to help."

Emergency responders "are working hard to recover people still inside the building," said Deputy Chief Constable Rose Fitzpatrick, of Police Scotland, earlier Saturday.

The helicopter carrying two police officers and a civilian pilot crashed into the downtown Clutha Bar as it was crowded with revelers, authorities said.

"Everyone was really confused and scared," said Grace Maclean, who was in the pub listening to a band when the crash occurred. "No one had a clue. There was no explosion. No bang. It was really quiet."

The helicopter impacted as patrons listened to the Esperanza band, which had taken the stage a short time earlier.

"Most of the helicopter appeared to be inside the pub," said Jim Murphy, a UK member of parliament who arrived at the site moments later and saw people scrambling out to get out. Murphy represents a portion of Glasgow.

Surreal scene

Patrons described a surreal scene followed by confusion.

"We were watching the band and there was kind of like a (roof) panel fell, there was a whoosh of dust, then we laughed that the band said, 'We didn't think we were going to bring the roof down,'" Maclean said. "The roof didn't come down. ...It didn't come completely down anyway."

After the crash, an outburst of noise followed.

"Everyone was yelling (for) their friends, but everyone seemed to find everyone," Maclean said.

Christina O'Neill, who saw the crash from her apartment across the street, said she heard what sounded like a low-flying airplane.

"I thought that didn't sound right for a couple of seconds," she said.

After the sound of impact, she saw smoke and people running from the pub.

"I know there were a lot of people lying on the ground kind of getting looked into," she said.

'Blood pouring'

In a Facebook posting, the band indicated that all its members made it out safe.

"It seems that the band are all OK. Not so sure about everyone else," the post said.

A later post, by the band's bass guitar player, spoke of the realization "that it is all definitely horribly real. Despite the situation everyone was so helpful and caring of each other. The police, ambulances, firefighters all did a stellar job and continue to do so today in extremely difficult conditions."

Band manager Gary Anderson described his bewilderment when he heard "a loud bang followed by lots of debris, smoke, stuff coming coming towards where I was standing at the door."

People he knew pulled him outside into the street, he said, where he could see the rotor blades sticking out of the building's roof.

"The fire brigade, paramedics, police were all there within minutes and everybody was just helping folk who could get out, just shouting on them because at this time you couldn't really see much inside, you were just trying to help people out and shouting to them, 'come here, come here' towards the doors," he said.

"There were people staggering out, there were lots of people coming out with blood pouring from their head and covered with all sorts of just debris from whatever it was had happened."

The pub's Facebook page contained numerous posts from people concerned about the incident.

Those trapped in the debris were communicating with rescuers, said Lewis Ramsay of the Scottish Fire and Rescue Service.

Hours after the crash, the helicopter with "police" on its damaged tail was still smoldering.

Bond Air Services, which reportedly owns the helicopter involved, said it was working with police and emergency services.

"Our thoughts are with those who have been affected by this tragic incident," the company said in a statement.

CNN's Bharati Naik, Greg Botelho, Nic Robertson and Elwyn Lopez contributed to this report.