U.S. Secretary of State Antony Blinken will aim with a trip to the Pacific this week to remind the world that Washington's strategic long-term focus remains with the Asia-Pacific region despite an escalating crisis with Russia over Ukraine.

Blinken is due to depart on Monday for Australia, Fiji and Hawaii for meetings with key allies and to reaffirm a commitment to push back against what the United States calls China's growing economic and military "coercion."

Highlights of the week will be a meeting of the informal grouping of Australia, India, Japan and the United States known as the "Quad," work to advance diplomatic efforts regarding North Korea and discussions on the concerns over Pacific Islands where U.S. officials believe China wants to establish bases.