Sky News reported that Allen was arrested in south Leeds after an officer, who was travelling to work, saw a man fitting his description.
Allen knew Dunford, who was last seen alive a week ago and was bludgeoned to death at his home. Allen lived next door until about a year ago. Detectives saw no sign of forced entry.
It is not thought Allen knew Davison, who was found dead by her sister in Whitby on Thursday. She had suffered head injuries. Detectives said robbery was a possible motive but stressed that investigators were keeping an open mind.Independent