Dozens of terrified people run for their lives, their screams intermittently drowned out by the sound of rapid gunfire in dramatic video footage captured by a journalist for the French newspaper Le Monde.
The video shows the partygoers at Bataclan nightclub pouring out of three emergency side exits and into an alley after gunmen killed at least 127 people at the rock concert venue.
Several can be seen stumbling, collapsing on the floor outside, struck by bullets as they fled. Three people clung by their finger tips to first and second floor windows before hauling themselves to safety when the gunfire finally stops.
In other scenes, the injured are dragged to safety along the alleyway by friends, leaving behind bloody trails on the road. An injured woman can be seen in agony on the floor outside an emergency exit, screaming for help.
Rapid gunfire can be heard at the beginning of the footage, lasting two-and-a-half minutes, and then two shots can be heard about a minute later and a further two shots after that, ten seconds later.
The footage was captured by Daniel Psenny, a journalist with le Monde newspaper, who lives in an apartment behind the Bataclan club. He was subsequently wounded when a bullet struck him in the left arm after he had abandoned the safety of his flat to go down to street level to help the injured.
Mr Psenny first realised there was an incident when he heard the sound of what he thought was firecrackers going off and at first believed – because he was watching a crime thriller at the time – that it was coming from his television.
“But the noise was loud, so I went to the window,” he said, “I live on the second floor, and my apartment overlooks the emergency exits Bataclan.
“Everyone was running from all sides, I saw guys on the floor, blood … I understood that there was something serious. I asked what was happening. Everyone rushed back to the Rue Amelot and Boulevard Voltaire.
“A woman was clinging to the Bataclan window on the second floor. I thought of the images of 9/11 [attacks on the World Trade Center].”
Mr Psenny stopped filming and went down to the street to aid the injured. “I opened the door of the building. There was a man lying on the sidewalk,” he recalled, “With another man we tried to drag him to safety in the lobby.
“At that moment, I was hit by a bullet. I do not know [what happened], my mind is a blank. But I remember it felt like a firecracker exploding in my left arm, and I saw that it was spurting blood.
“I think the shooter was at the Bataclan window. The man we saved was shot in the leg. He was an American. He vomited, he was cold, we thought that he would die.
“We called the emergency services, but they could not evacuate us. I called a doctor friend who told me how to make me a tourniquet with my shirt. And we stayed there until the assault was over.”
In horrific scenes officers stormed the Bataclan concert hall where hostages were being held but attackers, wearing suicide belts, blew themselves up.
John Leader, originally from Australia, has been living in Paris for the past 15 years. He is 46 and is a director in an environmental company. On Friday night he took his 12-year-old son Oscar to see The Eagles of Death Metal. At first he thought the bangs were firecrackers.
“I pushed Oscar to the other side of the mixing desk. People were three or four deep hiding there,” he told The Telegraph. “The lights suddenly went on. It had been dark but now there were full house lights. Everybody went quiet. It was clinical. All you heard was bang, bang, bang. The shooter was standing at the back of the hall and targeting people at the front. He was taking aim. He was not spraying. It was clinical. He was aiming: aim, fire, aim, fire, aim, fire.
“Everyone was thinking: if I move I’m dead.
“Oscar was trying to get under the mixing desk but when he got under there he saw the mixing engineer waving at him to go back because the attackers had a full view of the other side of the desk.
“He tried to get up but I told him: “Stay down, these guys are killers.”
“They were now changing magazines. I heard one say something about Syria.
“I popped my head up and looked at them. One was doing crowd control. He was standing there with his gun at the ready, but not shooting, just watching the crowd. The other one was reloading and then he started shooting again.
“There was no way anyone was going to overpower them. So it was wait and see. I reckon he did three or four reloads and I thought maybe they will just run out of ammunition.
“Then there was a lull. This was after what seemed to me like 10 or 15 minutes. Someone shouted “Ils sont partis” (They are gone).
“To my right I saw people running and saw that someone had opened an exit door. I grabbed Oscar and said “Let’s go!” Then we saw a lake of blood and bodies lying everywhere.
“But we had to hit the deck again because there was more shooting. During another lull I pushed Oscar towards the stairs that led to the exit. I ended up being about five seconds behind him getting out, and when I did get outside he was gone.
“I saw a crowd of people about 50 metres away, running. I thought he was with them. I screamed “Oscar” and was expecting to see him turn around. But no.
“I went back to the exit and up the stairs. By now there were bodies on the stairs, I think maybe of people who had been shot and had dragged themselves towards the exit. I couldn’t see Oscar. And then the shooting started again and I went outside.
“I walked down the road and turned right and asked a cop there if he had seen my son. He said no and that I should get out of the area immediately.
“Then I called Oscar on his mobile and he told me he was Ok and was nearby. I ran to meet him. He’d lost his wallet and his shoes during our escape from the Bataclan.”
Eyewitness Ben Grant said he was in a bar with his wife when the gunshots were fired and he had seen six or seven bodies on the ground.
He told the BBC: “I was told people in cars had opened fire on the bar.
“There are lots of dead people. It’s pretty horrific to be honest.
“I was at the back of the bar. I couldn’t see anything.
“I heard gunshots. People dropped to the ground. We put a table over our heads to protect us.
“We were held up in the bar because there was a pile of bodies in front of us.”