Police were called to an address in Tower Hamlets this morning following reports of a serious assault.
Upon their arrival at Sandall House near Victoria Park, officers found a 60-old-woman suffering from severe head injuries and a wound to her chest.
The woman was pronounced dead a short while later.
A male youth was arrested at the scene on suspicion of murder and has been taken to an east London police station.
Police are not looking for anyone else in connection with this incident.