A reward of up to £20,000 is on offer for information leading to the arrest of suspected Clapham chemical attacker Abdul Ezedi.Investigators believe there are people who know where he is who have not come forward.They warned anyone found assisting him faces arrest.Ezedi is suspected of attacking a 31-year-old woman and two children with a corrosive substance on Wednesday night. On Sunday afternoon, the Metropolitan Police updated their most recent sighting of him, saying that the 35-year-old was seen at 9.33pm when he exited Tower Hill Underground station. This suggested he continued his journey from the previous sighting point at King's Cross.