"Spoke to PM Sushil Koirala, who is in transit in Bangkok on his way to Kathmandu. Assured all support & assistance during this tough time," Modi tweeted.
Modi, who is personally monitoring the situation at home as well as in Nepal, spoke to Yadav first as Koirala was abroad and not reachable.
Later, Modi talked to Koirala and assured him of "all assistance to deal with the situation arising due to the earthquake", the PMO said.
A high-intensity quake shook Nepal's capital, causing extensive damage to buildings.
The Prime Minister has also taken report of the situation in districts of Uttar Pradesh, Bihar and other states bordering Nepal besides speaking to the Sitamarhi MP.

PM Modi speaks to CMs after quake

Modi also spoke to the chief ministers of various states and convened a high-level meeting to take stock of the situation.

The Prime Minister, who is keeping a close watch on the situation, spoke to chief ministers of Bihar, Sikkim, UP and Madhya Pradesh.
"We are in the process of finding more information and are working to reach out to those affected, both at home & in Nepal," Modi tweeted immediately after the quake whose epicentre was in Nepal and measured 7.9 on the Richter scale.
The Prime Minister has convened a high-level meeting with Ministers & top officials at 3 PM in the wake of the situation arising due to the earthquake.

A strong quake measuring 7.9 on the Richter scale shook Nepal and several parts of India, including the national capital, leaving a trail of devastation in the Himalayan nation.
"PM @narendramodi has spoken to Bihar CM Shri @NitishKumarJDU ji in connection with the Earthquake. In the wake of the Earthquake, PM has spoken to Sikkim CM Shri Pawan Chamling," PMO tweeted.
"Due to the situation, the PM also spoke to Madhya Pradesh Chief Minister Shivraj Chouhan," it said in another tweet.

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