***WARNING*** The following video contains graphic content that may be disturbing to some.
BENGHAZI, LIBYA (AP) -- Amateur video has emerged which appears to show Libyan civilians carrying a still-breathing US diplomat out of a room after last week's deadly attack on the US consulate in Benghazi.
The person who shot the video told The Associated Press on Monday that US Ambassador to Libya Chris Stevens was still breathing when he was found lying on the ground at the consulate.
Fahd al-Bakoush, a freelance videographer, was among those searching the consulate after gunmen and protesters rampaged through it last Tuesday night.
He said he heard someone call out that he had tripped over a dead body.
The video - which al-Bakoush posted on YouTube - shows several men pulling Stevens's seemingly lifeless body from a small dark room through a window with a raised shutter and laying him on the floor.
One man can be seen touching the ambassador's neck to feel for a pulse. Some of the men shout: "God is great."
"I saw him alive," al-Bakoush told The Associated Press on Monday. "We said he was alive, yes, alive. He was moving his eyes, he was staring at us."
"We didn't recognise him as the ambassador, we thought he was a foreigner and we were trying to help him," he added.
"The young men were happy because we had thought he was dead," al-Bakoush said.
"So the people were very happy and started to shout 'God is great' after they said he was alive. One shouted: 'Let's move him to my car'."
The video appears to show several man carrying the ambassador's body out of the consulate.
The video has been authenticated since Stevens's face is clearly visible and he is wearing the same white T-shirt seen in authenticated photos of him being carried away one another man's shoulders, presumably moments later.
Two colleagues of al-Bakoush who also witnessed the scene confirmed that he took the footage.
Stevens and three other Americans were killed in the attack on the consulate, part of a wave of assaults on US diplomatic missions in Muslim countries over a low-budget movie made in the United States that denigrates the Prophet Muhammad.
The accounts of all three witnesses mesh with that of the doctor who treated Stevens that night.
Last week, the doctor told The Associated Press that Stevens was nearly lifeless when he was brought by Libyans, with no other Americans around, to the Benghazi hospital where he worked.
He said Stevens had severe asphyxia from the smoke and that he tried to resuscitate him with no success.
Only later did security officials confirm it was Stevens.
Al-Bakoush also told The Associated Press that he would be speaking to Libyan authorities about the incident - and also that he would be prepared to testify that the cause of Stevens's death was "neglect".
He did not elaborate, however.