Russia may have committed a war crime in Syria, British Foreign Secretary Boris Johnson said Sunday.
Johnson was asked in an interview with British broadcaster BBC whether he considered the bombing of a humanitarian aid convoy near Aleppo on September 19 to be a war crime.
"[Russian President Vladimir] Putin's regime is not only, as it were, handing Assad the revolver he is in some instances actually firing the revolver himself," Johnson said, referring to Syrian President Bashar al-Assad.
The consideration should be whether the bombing of the aid convoy was done with the knowledge that the targets were civilian, and would therefore constitute a war crime, Johnson said.
He described the current bombing of Aleppo - which began after an international ceasefire deal collapsed nearly a week ago - as "absolutely barbaric."
The Russians "are guilty of protracting this war and of making it far more hideous," he added.
UN aid deliveries to Syrians caught in the conflict zones were temporarily stopped following the attack on the aid convoy outside Aleppo last week, which killed 21 people.
The US blames Russia, but Moscow denies it was behind the attack.