Yangon  - United States Assistant Secretary of State Kurt Campbell plans to visit Myanmar soon, opposition sources said Wednesday.

"US Embassy Charge d'Affaires Larry Dinger told us that Mr Kurt Campbell is to visit here but he did not say exactly when (the visit) will be," National League for Democracy (NLD) spokesman Nyan Win said.

Political observers in Yangon said the visit may be an effort to continue the dialogue between the Myanmar junta and United States that was initiated in New York last month.

"They (US embassy officials) told us that Campbell will also meet us during his visit here," Nyan Win said after Dinger visited the opposition party's headquarters.

The US diplomats explained the administration's new policy towards Myanmar during the meeting, he said.

US President Barack Obama has expressed a desire to "engage" with Myanmar, one of the world's pariah nations.

Myanmar's ruling junta is widely condemned for keeping opposition leader Aung San Suu Kyi under detention for 14 of the past 20 years and for refusing to introduce democratic reforms.

The country has been ruled by the military since 1962. The victory of the NLD in the 1990 general election has been ignored by the military.(dpa)