BANGKOK, Thailand - Myanmar is "thinking about" freeing Nobel laureate Aung San Suu Kyi but has not set any timeframe for her release, Thailand's foreign minister said Thursday after talks with top officials in the military-ruled country.

Thai Foreign Minister Kantathi Suphamongkhon said he was encouraged by his Wednesday meeting with Myanmar Foreign Minister Nyan Win.

"I told him frankly that I am disappointed about the extension of the detention of Aung San Suu Kyi," Kantathi said in an interview with Thailand's Business Radio station.

"He replied, 'I understand how Thailand feels, and we are looking for a way to release her but I cannot tell when she can be released,'" Kantathi said.

He quoted his counterpart as saying Myanmar's leaders were "thinking about how to go ahead with this matter."

Suu Kyi, 60, Myanmar's opposition leader, has spent nearly 11 of the last 17 years in detention, mostly under house arrest.

Kantathi traveled to Myanmar on Wednesday as part of a high-level delegation led by Thai Prime Minister Thaksin Shinawatra on a hastily arranged trip to meet leaders of the military junta.