Smoke rises from buildings following air strikes on Zamalka, one of the few remaining rebel-held pockets in Eastern Ghouta, on the outskirts of the Syrian capital Damascus on March 21, 2018.  / AFP PHOTO / AMER ALMOHIBANY
<p>Smoke rises from buildings following airstrikes&nbsp;in Eastern Ghouta, on the outskirts of the Syrian capital Damascus on March 21, 2018. Amer AlMohibany&nbsp;/ AFP&nbsp;</p>

Syrian civilian deaths from Russian air strikes hit record levels in March, monitor says