UNB, Narayanganj :Detective Branch (DB) of Police arrested one of the aides of Nur Hossain, the prime accused in the sensational seven-murder murder case of Narayanganj, from the bordering area of Akhaura upazila in Brahmanbaria district on Saturday morning.The arrestee was identified as Ali Mohammad, 45.On secret information that Ali Mohammad was staying in one of his relatives’ home in Akhaura, police raided the house and arrested him, said officer-in-charge of Narayanganj DB Mamunur Rashid Mandol, also investigation officer of the seven-murder case.Ali will be produced before the court on Sunday seeking remand, said the IO.