LONDON, Jan 18 (Reuters) - The suspected gunman who took four people hostage at a Dallas-area synagogue and was himself killed was known to British intelligence and assessed to no longer be a threat at the time he travelled to the United States, the BBC reported. "Malik Faisal Akram, the Texas synagogue hostage-taker, was known to MI5 and was investigated in 2020. He was assessed to be no longer a risk at the time he flew to US at New Year," Frank Gardner, BBC Security Correspondent, said in a tweet.