New Delhi: President Pranab Mukherjee on Sunday left on a four-day state visit to Vietnam during which several agreements are expected to be signed.

These include agreements on direct air services between the two countries, and for India to scout for oil and gas in the South China Sea.

Mukherjee will visit both Hanoi and Ho Chi Minh City.

He is accompanied by a high-power delegation, including Petroleum and Natural Gas Minister Dharmendra Pradhan, and six MPs, including Supriya Sule of the Nationalist Congress Party, K.V. Thomas of the Congress and Pervesh Verma of the Bharatiya Janata Party.