Gruesome video Saturday showed rows of dead Syrian children lying in a mosque in bloody shorts and T-shirts with gaping head wounds, haunting images of what activists called one of the deadliest regime attacks yet in Syria's 14-month-old uprising.
The assault on Houla, a group of villages northwest of the central city of Homs, killed more than 90 people, including at least 32 children under the age of 10, the head of the U.N. observer team in Syria said.
The attacks sparked outrage among international leaders and anti-regime groups and large protests in Syria, including the suburbs of the capital of Damascus and its largest city, Aleppo. It also renewed fears of the relevance of a month-old international peace plan that has not stopped almost daily violence.
More than a dozen amateur videos posted online Saturday gave glimpses of the carnage, showing lines of bodies laid out in simple rooms, many with bloody faces, torsos and limbs. In some places, residents put hunks of ice on the bodies to preserve them until burial.
One two-minute video shows at least a dozen children lined up shoulder to shoulder on a checkered blanket on what appears to be the floor of a mosque.
Blood trickled from one girl's mouth. One boy, appearing to be no more than 8, had his jaw blown off. The video shows flowered blankets and rugs covering several rows of other bodies.
Another video posted Saturday showed a mass grave, four bodies wide and dozens of meters (yards) long.
Activists from Houla said Saturday that regime forces peppered the area with mortars after large demonstrations against the regime of President Bashar Assad the day before.
That evening, they said, pro-regime fighters known as shabiha stormed the villages, gunning down men in the streets and stabbing women and children in their homes.
A local activist reached via Skype said regime forces fired shells at Houla, about 40 kilometers (25 miles) northwest of Homs. The shabiha entered the villages, raiding homes and shooting at civilians,
Abu Yazan said. More than 100 people were killed, more than 40 of them children and most of them in the village of Taldaw, he said. Many had stab wounds, another activist said.
"They killed entire families, from parents on down to children, but they focused on the children," Yazan said.
The Syrian government blamed the killings on "armed terrorist groups" -- a term it often uses for the opposition — but provided no details or death toll.
U.N. observers, among more than 250 who were dispatched in recent weeks to salvage the cease-fire plan, visited the site of the killings Saturday, finding spent artillery tank shells.
The head of the team. Maj. Gen. Robert Mood, called the attack a "brutal tragedy."
"Whoever started, whoever responded, and whoever carried out this deplorable act of violence, should be held responsible," Mood said.
The attack is yet another blow to the international peace plan brokered by envoy Kofi Annan and cast a pall over his coming visit to check on the plan's progress.
The cease-fire between forces loyal to the regime of Assad and rebels seeking to topple it was supposed to start on April 12 but has never really taken hold, with new killings every day.
The U.N. put the death toll weeks ago at more than 9,000. Hundreds have been killed since.
U.N. Secretary-General Ban Ki-moon said Friday that there has only been "small progress" on implementing the peace plan and blamed the Syrian government for much of the "unacceptable levels of violence and abuses." Annan is supposed to visit Syria soon to check on the plan's progress.
The grisly images were condemned by anti-regime groups and political leaders around the world.
"With these new crimes, this murderous regime pushes Syria further into horror and threatens regional stability," French Foreign Minister Laurent Fabius said in a statement Saturday.
The London-based Syrian Observatory for Human Rights released an unusually harsh statement, saying Arab nations and the international community were "partners" in the killing "because of their silence about the massacres that the Syrian regime has committed."
The Houla villages are Sunni Muslim. The forces came from an arc of nearby villages populated by Alawites, members of the offshoot of Shiite Islam to which Assad belongs, the activists said.
The activists said the Houla killings appeared to be sectarian between the two groups, raising fears that Syria's uprising, which started in March 2011 with protests calling for political reform, is edging closer to the type of war that tore apart Syria's eastern neighbor, Iraq.
"I don't like to talk about sectarianism, but it was clear that this was sectarian hatred," said activist Abu Walid.
The Britain-based Syrian Observatory for Human Rights said 96 people were killed, 26 of them children and four of them army defectors.
The group's head, Rami Abdul-Rahman, who relies on activists inside Syria, said all were killed in shelling, but that no forces entered Houla.
Syrian state TV condemned the opposition groups for the "massacre" in a statement Saturday.
"The armed groups are escalating their massacres against the Syrian people only days before international envoy Kofi Annan's visit in a bid to defeat his plan and a political solution to the crisis and with the aim of exploiting the blood of Syrians in the media bazar," it said.
The videos could not be independently verified. The Syrian government bars most media from operating inside the country.
The harsh condemnation from anti-regime groups reflects their growing frustration with international reluctance to intervene in Syria's conflict.
World powers have fallen in behind the U.N. plan. The U.S. and European nations say they will not intervene militarily, and while Saudi Arabia, Qatar and Libya have said they will arm Syria's rebels, no country is known to be doing so.
A spokeswoman for the opposition Syrian National Council called on the U.N. Security Council "to examine the situation in Houla and to determine the responsibility of the United Nations in the face of such mass killings, expulsions and forced migration from entire neighborhoods."
Also Saturday, the story of 11 Lebanese Shiites who were reported kidnapped in Syria this week took another strange turn.
Lebanese officials first said their expected arrival on a plane from
Turkey to Lebanon late Friday was delayed for "logistical reasons."
On Saturday, Turkey's Foreign Ministry denied the men were in Turkey — raising new questions about their fate.
Lebanese and Syrian officials blamed Syrian rebels for Tuesday's kidnapping. No group has claimed responsibility.
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