The European Union’s foreign policy chief Josep Borrell has warned of a further escalation of tensions in the Middle East at an informal meeting on Saturday after US retaliatory strikes on pro-Iranian militias in Iraq and Syria. “The Middle East is a boiler that can explode. And certainly, there are attacks both on the Lebanon border; north and south; there are attacks in Syria; there are attacks in Iraq, attacks in the Red Sea,” Borrell said. He was referring to US retaliation for attacks in the region by the Houthis and other Iranian-backed militias on targets believed to support Israel’s wa…