Russian President Vladimir Putin warned on Sunday that further Western attacks on Syria would bring chaos to world affairs, as Washington prepared to increase pressure on Russia with new economic sanctions.

In a telephone conversation with his Iranian counterpart, Hassan Rouhani, Putin and Rouhani agreed that the Western strikes had damaged the chances of achieving a political resolution in the 7-year-old Syria conflict, according to a Kremlin statement.

"Vladimir Putin, in particular, stressed that if such actions committed in violation of the U.N. Charter continue, then it will inevitably lead to chaos in international relations," the Kremlin statement said.