Police have arrested three persons for their alleged involvement behind August 12 explosion at Biratnagar Metropolitan Office.

District Police Office paraded the suspects Manoj Kumar Singh, 53, of Jahada Rural Municipality, Morang; Abhimanyu Giri, 20, of Laxmipurpatari Rural Municipality, Siraha; and Rajrijan Yadav, 24, of Sukhipur Municipality, Siraha; before the media on Sunday.

The trio was arrested from Morang and Siraha on Friday and Saturday.

Superintendent of Police Manoj Kumar KC said two other suspects Birendra Kumar Yadav and Rahul Yadav are on the run.

Police said Birendra Kumar, who is affiliated to  the underground outfit, Janatantrik Tarai Mukti Morcha (Revolutionary), is the mastermind behind the explosion.