US embassies in several Middle Eastern capitals yesterday warned American citizens to beware an “unforeseen escalation” in the regional conflict and urged them to be ready to leave hours after President Donald Trump threatened to hit Iran “very hard”. His threat came as US media reported Trump was considering renewed heavy attacks as soon as this weekend, including against energy infrastructure targets. The messages urged citizens to check flight details and to follow safety advice from local authorities. CBS News meanwhile reported that the United States and Israel were planning joint strikes on energy-related targets, possibly throughout the weekend. This week, Iran and the US resumed overnight exchanges of fire after a days-long lull in fighting, although there were no reported strikes overnight Friday to Saturday.