Unidentified persons detonated two bombs outside the Birendra International Convention Centre in Baneshwor, the venue of the Constituent Assembly (CA) meeting, Wednesday evening.
The first blast occurred near the western gate of the BICC at around 8:00 pm while another bomb went off ten minutes later. At least four people including a senior police official were injured in the incident.
Our correspondent present at the BICC premises said the noise of the blasts could be clearly heard from inside the Assembly hall.
Thousands of people had gathered outside the BICC to cheer the announcement of republic by the first CA meeting.
The bombs occurred just before the Assembly was about to get underway.
Similarly, one person was injured in a blast at Khula Manch, central Kathmandu, Wednesday evening.
It is not known who carried out the blast, but police officials said the Hindu fundamentalist outfit called Ranabir Sena that had taken responsibility for the blasts on Monday and Tuesday could be behind this.
The injured person has been taken to the nearly Bir Hospital for treatment