A man from Maharashtra and his six-year-old son drowned while playing on a beach in Oman today. The man's nine-year-old daughter is missing and rescuers are searching for her, the local police said. Shashikant Mhamane, 42, his wife and their children Shruti, 9, and Shreyas, 6, lived in Dubai. They were in neighbouring Oman on Sunday for a day-long trip, said Mhamane's brother, news agency PTI reported.