US national intelligence chief Jay Clayton has warned that Iran has increased its efforts to target Americans in the Middle East. Intelligence indicates plotting against US personnel has intensified. The warning comes as the US reduces staffing at four embassies in the region. The State Department has taken action based on intelligence received. The memo was shared with Secretary of State Marco Rubio. The security concerns have prompted heightened precautions. The warning was issued on Friday. The threat extends beyond the Middle East. The US is adjusting its diplomatic presence in response. The move reflects growing security risks. The intelligence highlights a significant escalation in Iranian activities. The situation has led to operational changes in US diplomatic posts. The warning underscores ongoing tensions in the region. The US is monitoring developments closely.