The vessel sank within five to seven minutes, said Red Sea governor Maj-Gen Amr Hanafi. He said some people had been unable to escape from their cabins. The four dead victims were found on the boat.
AFP news agency cited a local government source in reporting that the survivors recovered on Tuesday were also found on the boat.
They had been in a room that had not yet filled with water and had spent more than 24 hours in the overturned boat, AFP reported.
A total of 28 people were rescued by military personnel and a passing tourist boat in the hours after the vessel capsized.
The governor had earlier said other survivors were found in the Wadi el-Gemal area, south of Marsa Alam which is Egypt’s south.
The 44m Sea Story yacht had departed a port near Marsa Alam on Sunday for a five-day diving trip that was supposed to finish further north at the town of Hurghada.
It is believed to have been hit by rough winds overnight on Sunday – the day after Egyptian weather officials warned about 60-70 kmph winds and 13ft high waves on the Red and Mediterranean Seas.
