A three-month-old baby died on the same day his parents appeared in court accused of assaulting him.
Police were called by doctors after Rifat Mohammed was admitted to an east London hospital on Monday with critical injuries.
He was later transferred to another hospital in central London, where he died at 4.45pm on Tuesday.
Officers had already arrested and charged Rifat's parents, Mohammed Miah and Rebeka Nazmin, and both appeared in custody at Thames Magistrates' Court earlier on Tuesday.
Miah, 36, from St Leonard's Road, Poplar, was charged with causing grievous bodily harm (GBH) with intent and two counts of child cruelty.
Nazmin, 31, of the same address, was also charged with causing GBH with intent and two counts of child cruelty.
They were remanded to appear at Snaresbrook Crown Court on August 2.
Detectives from the Metropolitan Police Homicide and Major Crime Command are investigating and are in discussion with the Crown Prosecution Service about bringing further charges following Rifat's death.