At least five persons were injured in a bomb blast at Ratna Park in central Kathmandu Tuesday evening.
The explosion occurred at around 4:30 pm, near the venue of a cultural programme organised by the civil society to welcome the republic.
Two seriously injured persons have been taken to nearby Bir Hospital for treatment. Police said manhunt for those involved in the blast has begun.
A little known Hindu fundamentalist outfit Ranabir Sena has claimed responsibility for the blast.
The explosion took place couple of hours after the constituent assembly members were sworn in. The same group had detonated two crude bombs in front of the Birendra International Convention Centre (BICC) on Monday