The United States has warned that it would continue to push for sanctions against North Korea if the communist state continues to pursue nuclear weapons.

Philip Crowley, the assistant secretary of state for public affairs, told reporters Wednesday that Pyongyang will continue to face isolation and sanctions if it is unwilling to give up its nuclear program and if it continues to boycott the six-way nuclear talks.

Crowley reaffirmed that Washington believes the Korean Peninsula should be completely denuclearized. He said such a belief is the foundation behind U.S. policy and its interaction with other regional powers within the six-party process.

Crowley added that Kurt Campbell, the assistant secretary of state for Asian affairs, conveyed U.S. concerns over North Korea's alleged military collaboration with Myanmar when he met with officials from the South Asian country on Tuesday in New York.