On 16 June the Saudi crown prince said he would ‘deal with’ threats to his people and vital interests following attacks on tankers in the Gulf of Oman. America blamed Iran for the attack. The UK promised to deploy 100 Royal Marines ‘within weeks’ to ships operating from Bahrain. On 17 June Iran said its stockpile of uranium would soon exceed the agreed 2015 levels, and EU ministers said they were unconvinced that Iran was behind the attack and wanted more evidence and UN investigations. On 18 June the US supplied further images to back up their accusations, and promised 1,000 troops to the region in response to ‘hostile Iranian behaviour.’ On 19 June, forty workers were evacuated from an oil-drilling site in southern Iraq after it came under rocket fire. On 20 June Iran said it was ready for war after US confirmed that an American drone had been shot down in international airspace over the Strait of Hormuz. See