A college student was kidnapped on Monday while he was heading for his Kalanki-based Kasthamandap College in Kathmandu.
Biren Chhetri, a resident of Thankot, was abducted by an unidentified gang.
A group of five abductors hauled Chhetri into a Micro van and kidnapped him.
However, police freed Chhetri from the kidnappers and arrested four of them involved in the kidnapping, said DSP Yagya Bindo Pokharel.
Sushant Pokharel, Anwesh Adhikari, Amit Shrestha and Tshering Sherpa have been arrested. The fifth one involved in the incident has been absconding.