Prem Bahadur Giri, who runs an eatery at Ghorahi, killed his wife Padma Monday morning following days of family dispute.
Prem Bahadur hit his wife with a stone. Padma died of severe injuries to her head. Police have arrested Prem Bahadur.
Addressing a gathering of party leaders and cadres from Kathmandu District, Lingden said nothing would prevent the convention from taking place on the announced dates.