A day after Durga Tiwari, the district chairman of the CPN-UML-affiliated Youth Association Nepal, was shot dead in Rupandehi, the government on Tuesday formed a four-member committee led by Additional Inspector General of Police Bigyan Raj Sharma to investigate the killing.

Two motorcycle-borne assailants had attacked Tiwari at Devdaha Municipality-8 in Rupandehi district on Monday. Tiwari, who received bullet injuries in his abdomen, died at Devdaha Medical College, Bhaluhi.

The Home Ministry said in a statement on Tuesday that it has heightened surveillance in the border areas as search for the shooters is underway.

The committee has to submit its report to Home Minister Bimalendra Nidhi in the next 15 days, said ministry Spokesman Balkrishna Panthi.