Hong Kong police are investigating the deaths of a couple in their seventies after their bodies were discovered inside their home in Ma On Shan.Police said officers were alerted at around 8pm on Friday to a strange odour emanating from a flat in Heng Yat House at Heng On Estate.Firefighters forced entry to the flat, discovering a 72-year-old man and his 74-year-old wife lying in the living room, police said, adding the couple were pronounced dead at the scene.No suicide note was found, and...