The UN children's fund yesterday expressed "outrage" over the killings of children in Syria by issuing a blank statement, adding in a footnote that "no words will do (them) justice".

The statement came after a ferocious Syrian regime bombing campaign pounded the rebel-held enclave of Eastern Ghouta on Monday, killing 127 civilians, 39 of them children.

"No words will do justice to the children killed, their mothers, their fathers and their loved ones," said Geert Cappelaere, Unicef regional director for the Middle East and North Africa. Those words were followed by a blank page.

Children react at a make-shift hospital in Douma following air strikes on the Syrian village of Mesraba. Photo: AFP

Unicef voiced its anger in a postscript at the end of the news release, entitled "The War ON Children in Syria. Reports of mass casualties among children in Eastern Ghouta and Damascus."

A man weeps over his child at a make-shift morgue in Douma. photo: afp

"Unicef is issuing this blank statement," it said. "We no longer have the words to describe children's suffering and our outrage. Do those inflicting the suffering still have words to justify their barbaric acts?"

The United Nations on Monday demanded an end to the targeting of civilians in Syria.

And smoke rises from buildings following bombardment on the village of Mesraba. All pictures were taken on Monday in the besieged Eastern Ghouta region near Damascus. Air strikes hit Syria's Eastern Ghouta for a third straight day yesterday, bringing the civilian death toll to nearly 200. Photo: AFP

Held by rebels since 2012, Eastern Ghouta is the last pocket of opposition-held territory around Damascus and the regime of President Bashar al-Assad appears to be preparing a ground assault to retake it.