Russian Foreign Minister Sergei Lavrov has prompted a storm on social media Wednesday after being filmed swearing under his breath at a press conference with Saudi Arabia to discuss the crisis in Syria.

Lavrov and his Saudi counterpart, Adel al-Jubeir, met on Tuesday to discuss how to resolve the worsening civil war in Syria and how to combat the terrorist group, the so-called Islamic State.

The two had failed to resolve a disagreement over how to deal with Syrian President Bashar al-Assad, however. Russia believes that Assad, an ally of President Vladimir Putin, should be involved in a coalition to fight the Islamic State militants but Saudi Arabia wants Assad removed from power.

At a press conference following the meeting, taped footage shows a fed-up-looking Lavrov waiting as part of the conference is translated into Arabic, checking his mobile phone, adjusting glasses, briefly rubbing his forehead and then saying quietly: "F***ing morons" in Russian, Reuters reported.