Ukraine's Ministry of Foreign Affairs (MFA) has said escalation caused by Russian aggression in Ukraine's east increases as more pressure is put on Russia over Syria.

"Russia escalates more in Ukraine as it is pressed more over Syria – 66 attacks in Donbas, 1 UA KIA, 1 WIA. R.I.P.," spokesperson for Ukraine's Foreign Ministry Mariana Betsa wrote on Twitter on Friday, April 13.

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As UNIAN reported earlier, on April 7, Syrian opposition activists, rescue workers and medics said the rebel-held town of Douma in the Eastern Ghouta region had been attacked by government forces using bombs filled with toxic chemicals.

The Syrian-American Medical Society said more than 500 people had been found with symptoms "indicative of exposure to a chemical agent," and the World Health Organization on Wednesday demanded access to the area to verify reports from its partners that 70 people had died.

U.S. President Donald Trump tweeted that Russia should "get ready" for missiles to be fired into Syria, in response to an alleged chemical attack at the weekend.