His cousin was trying to rescue him out at sea (Picture: Daniel ReesNewsquest /SWNS)A seven-year-old boy has died just days after his teenage cousin who died trying to rescue him at West Mersea Beach, Essex. Musa Ahmed, his cousin Sameeha Rahman, 15, and her mum Shelina Rahman, 41, were out at sea on July 22 when they got into difficulty. Shelina and Sameeha, from Ilford, east London, died and Musa suffered life-threatening injuries after emergency services arrived at 5.35pm. A family friend said Sameeha was trying to save her cousin when she died. Sameeha Rahman with her father Dr Mansur RahmanShelina Rahman was a teacher‘We would also like to thank the whole community for their support and prayers.