Azad Ahmed and Raees, both of them in their twenties, who were doing their masters in Chemistry from a private institute in Selakui, fell into the river yesterday after slipping off a rock, they said.
Police reached the spot and launched a search for them when their friends raised an alarm.
Raees was found alive after hours of search but Ahmed is still missing, police said. However, efforts are on to trace him, they said.