A man is being held on suspicion of murder, attempted murder and false imprisonment after a botched robbery. The arrest followed an armed manhunt after the body of a middle-aged man was found at a lorry driver recruitment agency on an industrial estate in Pontypool, South Wales. The 45-year-old man killed in the attack has been named by Gwent Police as Kingsley Monk. Three other men were found seriously injured at the scene on Monday morning and were taken to hospital, where their condition was described as stable. They are believed to have been treated for smoke inhalation after the offices of Driver Line 247 Ltd were set on fire before the attacker fled. A 52-year-old Cardiff man was arrested over the incident on Monday night. Armed officers from South Wales Police surrounded a property in Penrhos Crescent, in the Rumney area of Cardiff. The street was cordoned off and neighbours asked to leave their homes while officers raided the house, but it was was found to be empty. The arrest was later made by officers from Gwent.