Key events
Rescue ships reached the boat about 30 minutes later and one person onboard was pronounced dead. Another person was taken to hospital in Calais by helicopter in a critical condition, the Premar Manche, a French agency that monitors the Channel, said.
It added that sea and air searches of the area continued.
The Cross Griz Nez – a coordination centre for rescue operations in Pas-de-Calais, received a message that a migrant boat was in difficulty around midnight, Premar Manche said.