Two people, including a student, were arrested Thursday and heroin valued at Rs.3 crore in the international market seized from them in West Bengal's Murshidabad district, police said.Acting on intelligence inputs, police intercepted the duo - Israil Sheikh (25) and Sabir Sheikh (18) - in Kalkali village and recovered three kg of heroin from their possession."The approximate value of the heroin is over Rs.3 crore. With Sabir being a class 10 student, we are looking if others from the school are involved. We are also probing if the two are part of an international gang," police said.