Hanoi, Sep 3 (IANS): Prime Minister Narendra Modi on Saturday left Vietnam for Hangzhou in China to attend the G-20 Summit being held on September 4-5.

"A packed day of diplomacy in Vietnam ends as PM @narendramodi emplanes for for Hangzhou to attend G20 Summit," External Affairs Ministry spokesperson Vikas Swarup tweeted.

Ahead of his departure, Modi thanked the people and government of Vietnam for their "very good hospitality" during his visit.

"Thank you Vietnam. I will remember this visit as a memorable & productive one, that laid the ground for even better India-Vietnam ties," he tweeted. 

On Saturday, Modi held delegation-level talks with Vietnamese Prime Minister Nguyen Xuan Phuc following which the two sides signed 12 agreements while giving a strong boost to bilateral defence ties and upgrading the relationship from a Strategic Partnership to a Comprehensive Strategic Partnership .

Following a luncheon banquet hosted in his honour by Phuc, Modi visited the Quan Su Pagoda, also known as the Ambassadors' Pagoda, here.

He then called on Vietnam National Assembly Chairperson Nguyen Thi Kim Ngan.

He also met with Vietnamese President Tran Dai Quang who voiced his support for India's Act East Policy. 

His last engagement was a call on General Secretary of the Communist Party of Vietnam Nguyen Phu Trong 

Modi arrived in Vietnam on Friday on what was the first bilateral prime ministerial visit from India to Vietnam in 15 years since the visit of then Prime Minister Atal Bihari Vajpayee in 2001.