In the hours after at least 51 civilians and one police officer were shot and killed at a Cairo sit-in on Monday, Egyptians on both sides of the bitter divide between supporters and opponents of the deposed Islamist president, Mohamed Morsi, shared video of the clashes online, as two conflicting narratives about who was responsible for the deaths took hold.
While footage released by the Egyptian military that appeared to show gunshots coming from the pro-Morsi camp was broadcast on state television and posted online by a secular opposition party, Islamists pointed to clear images of shots being fired by army snipers â" proof, they said, that peaceful protesters were murdered in cold blood.
Most of the clips of the confrontation were recorded from opposite sides of the front line between the army and the protesters in Cairoâs Nasr City neighborhood, but one witness to the clashes, a resident of the area who strongly supported Mr. Morsiâs ouster, recorded footage from his apartment building that offered vivid evidence of the barrage of shots fired by the soldiers.
The witness, Ibrahim el-Sheikh, a brother of a Cairo-based New York Times employee, posted four video clips on Facebook, including one of what he said was the car of a police officer who was killed during the clashes coming under fire from advancing soldiers.
Mr. Sheikh said later that the officer who was killed, Mohamed el-Mesairy, was a well-known neighborhood policeman who had sought to hide in his parked car as the security forces fired at Mr. Morsiâs supporters. Shortly after recording the footage, Mr. Sheikh said he went to the car and carried the officerâs body to an ambulance himself.
After the deadly clashes, a spokesman for the Egyptian military, Ahmed Aly, denied that the army had killed peaceful protesters, screening clips for journalists of Islamists throwing rocks and fireworks at soldiers, and firing at least two gun shots. âThe Armed Forces kills its enemies,â Mr. Aly told reporters at a news conference, it âwould never kill its children.â He insisted that the clashes began only after soldiers and police officers guarding the military officersâ club where Islamists believe the deposed president is detained had come under attack at about 4 a.m. from âa group of armed men.â
Mr. Aly was not asked about visual evidence of soldiers shooting at Morsi supporters on Monday, or about the militaryâs role in a notorious massacre of protesters in late 2011.
One widely shared clip of the clashes, viewed more than 260,000 times on Monday, appeared to show one masked man moving through a group of stone-throwing Islamists to fire a gun.
According to a title added to the video, it was recorded at 6:20 a.m., after the initial wave of fighting, at the intersection of El-Tayaran Street and Khedr El-Touny Street, near the military officersâ club.
While the Islamists had less access to television, the army attack on the protesters was extensively documented in online video shared with reporters by Sondos Asem, a media coordinator for the deposed president.
Among the most viewed clips, watched 500,000 times on Monday, was close-up footage of a man in uniform firing down from a rooftop, as a cameraman stood behind him filming.
Many of the images were clearly recorded after the start of the confrontation, which reportedly began after dawn prayers, but shots rang out on the soundtrack of another brief clip shared by Ms. Asem that was apparently filmed before sunrise.
(Readers should note that this video, posted on YouTube at about 6 a.m. local time in Cairo, bears the date July 7 because the video-sharing site uses the date in California when clips are uploaded.)
Another clip uploaded to YouTube early on Monday showed badly wounded men being rushed for treatment through the crowd of protesters in the pre-dawn light.
Ms. Asem also pointed to video posted online by a Brotherhood-affiliated channel that appeared to capture the sound of gunshots as the sun rose â" on a street that looked very similar to the one outside Mr. Sheikhâs home â" and another clip that showed wounded men being treated in the courtyard of a mosque.
Two more clips uploaded to a YouTube account registered to a Mohamed Madaney later Monday morning showed very graphic images of wounded men being carried from the scene of the street battle and desperate efforts to revive one man in what looked like an improvised field hospital.
Brotherhood activists also drew attention to distressing, extremely graphic video, said to have been recorded on Monday in a field hospital in Cairoâs Rabaa al-Adawiya Square, showing the blood-drenched bodies of âmartyrs and wounded from the Republican Guards massacre.â
In the clip, an unidentified man who appears to be a medic, said that the soldiers had attacked people while they were praying. âThis was a massacre,â he said, before adding, âThe Egyptian army has not even fired one bullet at the Jews. The scene you see here is a sin.â