Foreign ministers will seek to pressure Russia to distance itself from Syrian President Bashar al-Assad.
UK Foreign Secretary Boris Johnson said possible sanctions against Russian military officials would be discussed.
Allies will also be seeking clarity from the US on its Syria policy, after some apparently mixed messages.
US Secretary of State Rex Tillerson has strongly criticised Russia for failing to prevent Syria from carrying out the chemical attack on the rebel-held town of Khan Sheikhoun last Wednesday that left 89 people dead.
But he also said there had been “no change to our military posture” in Syria following a retaliatory US strike against a Syrian airbase, and that Washington’s “first priority” in Syria was to defeat so-called Islamic State (IS).
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Source: The BBC
