An 18-year-old man has died in hospital days after his sister lost her life after they got into difficulty in the sea near Clacton Pier.
The man, named by police as Haider Shamas, died in hospital yesterday, police confirmed. His 14-year-old sister Malika also died after entering the water near the pier on Thursday.
Another relative, a 15-year-old girl, is expected to make a full recovery.
Witnesses described "distressing" scenes as lifeguards and paramedics scrambled to help the three teenagers after they were spotted struggling near Marine Parade at about 1.40pm on Thursday.
Police said all three were treated on the beach by paramedics before being taken to Colchester General Hospital.
Becky Bryant, 40, said: "I saw two people being pulled from the sea and lifeguards trying to do CPR until the paramedics turned up.
"Everyone tried to take turns doing the CPR while the lifeboat went out again and retrieved the third person, who seemed not to be in such a bad way.
"It was so distressing, everyone was trying to do what they could - lifeguards, air ambulance, they truly worked as a team."
On 26 July last year, Ben Quartermaine, 15, died after getting into difficulty while swimming with a friend near Clacton Pier.
Clacton MP Giles Watling said the tragedy was a warning to people to be aware of the dangers of the sea.
He said: "It is extremely tragic and it is just awful this has happened two years running.
"People should be so careful about water, it is an inherently dangerous place.
