South Korean officials say Burma has agreed to comply with U.N. resolutions targeting North Korea's nuclear weapons program.

The move was announced Tuesday by a spokesperson for South Korean President Lee Myung-bak, who is on a landmark two-day visit to Burma.

The official also said that Burma has agreed to release a North Korean defector who was serving a five-year prison sentence for illegally entering the country.

Mr. Lee, who met with Burmese President Thein Sein on Monday, is the first South Korean president to visit Burma in nearly 30 years. He is expected to meet Tuesday with opposition leader Aung San Suu Kyi.

The last South Korean president to visit Burma was Chun Doo-hwan, who narrowly escaped a 1983 assassination attempt in Rangoon by North Korean commandos.

Burma has long been criticized for its suspected military relationship with North Korea. But on Monday, President Thein Sein denied that his country had any nuclear connections with Pyongyang.

He said Burma would comply with U.N. Security Council Resolution 1874, which prohibits supplying Pyongyang's weapons programs with arms, money, training, or other assistance.

The two leaders also agreed to increase economic ties, as well as cooperation on energy and natural resources.