File photo of Nepal Prime Minister Sushil Koirala. (Press Trust of India)
Nepal Prime Minister Sushil Koirala resigned today ahead of the election for the post tomorrow .
He tendered his resignation to President Ram Baran Yadav today, his office said.
Mr Koirala, president of the largest party, Nepali Congress, was elected in February 2014. Under his leadership, Nepal successfully promulgated a new constitution.
The party decided to again field Koirala for the post and will register his candidacy today itself.
Chairman of the CPN-UML, K.P. Oli, has already registered his candidacy. Once Koirala also does so, there will be a straight fight for the post.