The accused shot the victim using his uncle's gun.
An ordinary classroom fight over seats turned deadly in Uttar Pradesh's Bulandshahr district when one Class 10 student shot dead another, the police said on Thursday.
According to the police, the two boys - both aged 14 - fought over seats in the class on Wednesday.
One of them was so incensed by the exchange that he got his uncle's gun to school and shot the other one dead on Thursday morning.
"The two apparently had a fight about sitting in class yesterday. The accused went home and stole a licensed revolver belonging to his uncle, who is in the army and currently home on leave," senior police officer Santosh Kumar Singh said.
"He came to class and shot the other student. He was taken into custody at the scene itself," the police officer added.
The police found another country-made pistol in his bag, suggesting how determined he was to carry out the shooting.
The incident took place at around 11 am after the first two periods of class.
The accused shot his classmate thrice - in the head, the chest and stomach. The victim died on the spot.
After the shooting, the boy tried to flee the scene. He came to the ground floor from the first-floor classroom and fired in the air to discourage others from catching him.
However, a few teachers managed to overpower him and take his gun away. The boy fiercely fought back even then, the police said.
The teachers called the police who took the boy into custody.