“The campaign of maximum pressure on the Iranian regime is working. If Iran made this attack (against Saudi oil refineries. - RT ) in order to force the president to retreat, then they will fail, ”Pence wrote on Twitter.

Earlier it became known that US Secretary of State Mike Pompeo will travel to Saudi Arabia to discuss rising tensions with Iran and the incident with an UAV attack on Saudi oil plants.

US Senator Lindsay Graham called for Iranian refineries to be included in the list of targets for a possible military “response” to the incident.