A minor explosion terrorised cadres of ruling parties gathered at Tiwari Bhanjyang, Pauwadungma rural municipality-2 of the Bhojpur district on Wednesday.

The ruling alliance was preparing to host a mass meeting there as a part of its campaign for the federal and parliamentary elections scheduled to be held on Sunday.

DSP Sharad Thapa of the District Police Office says the incident site is 200 metres away from the event venue.

One person has sustained an injury on a leg.

CPN-Maoist Centre Chairman Pushpa Kamal Dahal among central leaders of the ruling parties was scheduled to address the meeting.

Details of the incident are awaited.