Nellore: Four students went missing while swimming in the sea at Isakapalli seashore in Allur Mandal during the Sankranthi festival in Andhra Pradesh’s Nellore district, said officials. All four were students of Gollapalli Ashram School in Allur Mandal. According to officials, the students had come to their relatives’ houses in Errapagunta village under Allur Panchayat.