Detectives have launched a murder inquiry after the death of a 21-month-old baby boy.
Police arrested two people, one believed to be the child’s mother, after being alerted by hospital staff.
Officers interviewed the pair, a 29-year-old woman and a 24-year-old man, on two separate occasions before releasing them on bail on Wednesday.
Scotland Yard said the baby died in Sidcup, south-east London, on Monday.
A post-mortem examination at Great Ormond Street Hospital the next day revealed the cause of death was multiple injuries.
A Metropolitan Police spokeswoman said: “The death is being investigated by the child abuse investigation command major investigation team based at East Ham.
“It is being treated as murder.”