Video of Army Shooting Islamists in Cairo Stokes Anger

Video recorded during deadly clashes on Monday between Egyptian security forces and Islamist protesters, provided to The Lede by Ibrahim el-Sheikh, a witness.

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.

Video of Monday’s clashes in Cairo, released by Egypt’s military.

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.

Video posted on YouTube Monday by Emad Eldin Elsayed showed badly wounded protesters and an army sniper firing from a rooftop during clashes in Cairo.

Most of the clips of the confrontation were recorded from opposite sides of the front line between the army and the protesters in Cairo’s Nasr City neighborhood, but one witness to the clashes, a resident of the area who strongly supported Mr. Morsi’s 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. Morsi’s supporters. Shortly after recording the footage, Mr. Sheikh said he went to the car and carried the officer’s 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. “The Armed Forces kills its enemies,” Mr. Aly told reporters at a news conference, it “would never kill its children.” He insisted that the clashes began only after soldiers and police officers guarding the military officers’ club where Islamists believe the deposed president is detained had come under attack at about 4 a.m. from “a group of armed men.”

Mr. Aly was not asked about visual evidence of soldiers shooting at Morsi supporters on Monday, or about the military’s 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.

Video of an armed man among a group of stone-throwing Islamists in Cairo on Monday.

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 officers’ 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.

Video posted online by supporters of Egypt’s deposed president, said to show an Egyptian soldier firing down at Islamist protesters from a rooftop in Cairo on Monday.

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.

Video said to show the early stages of an attack by Egyptian security forces on an Islamist sit-in.

(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.

Video uploaded to YouTube on Monday morning in Cairo appeared to show wounded protesters being rushed for treatment.

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. Sheikh’s home â€" and another clip that showed wounded men being treated in the courtyard of a mosque.

Video posted on an Islamist YouTube channel on Monday, said to have been recorded as shots were fired at supporters of Egypt’s deposed president by the security forces.

Video said to show wounded protesters being treated in Cairo’s Nasr City neighborhood on Monday.

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.

Graphic video posted online Monday showed wounded men being evacuated from the scene of a street battle between Islamists and the security forces in Cairo.

Video of medics attempting to revive a man on Monday in Cairo

Brotherhood activists also drew attention to distressing, extremely graphic video, said to have been recorded on Monday in a field hospital in Cairo’s Rabaa al-Adawiya Square, showing the blood-drenched bodies of “martyrs and wounded from the Republican Guards massacre.”

Extremely graphic video of dead bodies, said to have been recorded on Monday in a field hospital in Cairo.

In the clip, an unidentified man who appears to be a medic, said that the soldiers had attacked people while they were praying. “This was a massacre,” he said, before adding, “The Egyptian army has not even fired one bullet at the Jews. The scene you see here is a sin.”