In a tragic incident, a student of a Bhubaneswar-based private engineering college drowned in the sea here while another went missing near the Mangala river mouth on Sunday. The deceased student was identified as Ashquie Mohapatra and the missing student as Satyajit Sahani. A third student was rescued by local people. The mishap took place when the three students, who had gone to the spot for a picnic, went into the sea to take bath.