In a communique, the Revolutionary Armed Forces of Colombia, or FARC, said the planned liberation springs from efforts by President Hugo Chavez of Venezuela and 'other friendly governments' to seek a solution to the country's long-running conflict.

The FARC set no date for the promised liberation of Ms Gloria Polanco, Mr Luis Eladio Perez and Mr Orlando Beltran - all Colombians - kidnapped in 2001. But it said it wants to free the hostages on Colombian territory to Mr Chavez or someone chosen by him.

Venezuela's government welcomed the FARC's announcement on Sunday, saying it shows the rebels 'continue to be motivated to achieve a humanitarian accord' to swap rebel-held hostages for imprisoned guerrillas.

In a statement, Venezuela said that would be 'a firm and definitive step toward peace,' and expressed willingness to help.

The FARC communique, dated Jan 31, was received late Saturday by news organisations including the leftist ANNCOL news agency, which regularly publishes FARC statements online.

Interior Minister Carlos Holguin told reporters on Sunday that his government welcomed the FARC's unilateral gesture. 'We're disposed to do anything necessary so these countrymen regain their liberty.' The FARC wants to exchange more than 40 hostages held for as long as a decade for hundreds of imprisoned rebels. But President Alvaro Uribe has rejected its demand that rebel representatives be allowed to carry arms in a proposed demilitarised zone to hold hostage talks.

In August, Colombia's government asked Mr Chavez to mediate the proposed swap. But it cancelled that role in November, accusing him overstepping his mandate.

Hostages
The FARC freed two high-profile hostages on Jan 10 to Venezuelan government representatives in a mission coordinated with the International Red Cross. But it has held onto its most famous captives: three US military contractors and Ms Ingrid Betancourt, a dual French national who was running for Colombia's presidency when the FARC seized her in February 2002.

The FARC did not specify the ailments of the three hostages it said it was releasing. Letters penned by fellow captives carried out of the jungle last month by freed hostages Ms Clara Rojas and Ms Consuelo Gonzalez described debilitating ailments including malaria, chronic diarrhoea and diabetes.

Sen Perez was kidnapped in June 2001. Other hostages say he has been held in jungle camps alongside Ms Betancourt and the three Americans, seized when their surveillance plane crashed in FARC territory in early 2003.

Ms Polanco, a political leader, was kidnapped from her apartment in the southern city of Neiva along with her two sons in August 2001.

The sons were released soon after.

She has recently been held in a group with Mr Beltran, an ex-congressman snatched in August 2001. In a letter he wrote to his wife in December, Mr Beltran spoke of being kept in 'concentration camp-like conditions,' she said Sunday in a radio interview.

'They're forced to sleep chained to a tree.' On Monday, marches to denounce the FARC and their kidnapping tactics are planned in Colombia and cities around the world, with nearly 100,000 people confirming their participation on Facebook.com.

The FARC has been trying to overthrow Colombia's central government for nearly five decades Latin America's largest guerrilla army, it uses kidnapping to pressure the state. It's main source of funding is the cocaine trade. -- AP