Police are yet to track down the Class X student of Scottish Church Collegiate School who went missing after stepping out of the north Calcutta institution on Saturday.
Officers said the boy, who does not have a cell phone, was carrying Rs 20 when his father dropped him to school on Saturday. He was in school uniform and carrying his school bag.
Police said the photograph and details of the student, a Kankurgachhi resident, had been circulated to all police stations across the state.
"Effort are on to trace him. We are trying to find out whether he has gone to a friend or relative's house in some other state," an officer said. "We are trying to contact the relatives of the family who are living outside Bengal."
The family lodged a missing diary with Burtolla police station, under which the school falls, when he failed to return home on Saturday. On Sunday, his paternal uncle modified the complaint into one of abduction.
The school authorities have said the student had been suspended in July for fudging marks on the math answer script of the first-term exams, which were held in May. He is however, free to sit for the exams.
Principal Bivash Saniel said the student had changed the marks on the script from 27 to 31, out of 40.
The boy's family has claimed they were unaware of the suspension.
On Monday, the boy's parents and more than 20 neighbours had barged into Saniel's room and accused the authorities of not helping the police track down the student.
The siege continued for around three hours and was lifted after Saniel fell ill and had to be shifted to hospital.