Ionut, 41, was last seen on Thursday (July 23) and is described as 5ft 5in tall and of medium build with short brown hair. He was last seen wearing grey shorts and a white T-shirt. Officers believe he could be in Dagenham and travelling to areas along the District line on the Underground. A spokesperson for Hertfordshire Police said: "Officers are growing increasingly concerned for his welfare. " Those who are with Ionut now or have seen him in the last few moments should "call 999 immediately," the force added.