At least two migrants are feared to have drowned in the English Channel, the Daily Express understands.
Sources have indicated the death toll may rise further after a boat sank in French waters.
A UK Government spokesperson said: “We can confirm there has been an incident in the Channel involving a small boat in French waters.
“French authorities are leading the response and investigation. We will not be commenting further at this stage.
This is a breaking story. More to follow.