A murder probe has been launched after a 50-year-old man was fatally stabbed in east London.Police rushed to Chapel Road in Ilford at around 1.06am on Friday following reports of a stabbing.The victim was found in a block of flats' corridor with stab wounds. Despite the best efforts of paramedics, he was pronounced dead at 1.30am.Three men - aged 40, 36 and 28 – were arrested on suspicion of murder and remain in custody.