New York - President Hu Jintao and United States President Barack Obama are expected to meet during the Nuclear Security Summit for the first time since Sino-US ties became frayed over a series of contentious issues this year.

Hu is scheduled to arrive in Washington DC on Monday local time to attend the summit.

Since the leaders' last meeting in November, the two countries have clashed over such issues as Obama's endorsement of a $6.4-billion US arms sales deal with Taiwan, the US president's meeting with the Dalai Lama, Google's row with China's Internet regulators and the US pressure on China to appreciate its currency.