Coronavirus LIVE: ‘Healthy’ 13-year-old boy dies as Doncaster cases rise to 56
A spokesman for the trust said the boy's death had been referred to the coroner, but gave no further details.
It is understood he had no underlying health conditions.
As of 17:00 BST on Tuesday, the number of UK deaths was 1,789.
The latest figures saw a daily increase of 381 - the biggest rise so far.
In Doncaster there have been 56 confirmed cases – an increase of seven on the previous day’s figures – although the actual figure is thought to be far higher.
There have been two deaths in Doncaster.