Venezuela has suspended a regional summit scheduled for 5 July amid continuing speculation over the state of health of Venezuelan President Hugo Chavez.
President Chavez left Venezuela on 8 June for Cuba, where he had surgery, apparently for a pelvic abscess.
On Tuesday, Cuban state TV aired images of President Chavez talking animatedly to former Cuban leader Fidel Castro.
But officials said the summit, which he was due to host, had been delayed.
Analysts say the suspension of the Community of Latin American and Caribbean States (CELAC) meeting will be a blow to President Chavez.
He was due to chair the first gathering of the new regional bloc on Margarita island, off the Venezuelan coast.
Venezuelan officials had earlier said that extended video footage released on Wednesday and showing the president apparently looking well proved his recovery was continuing.
Vice-President Elias Jaua said President Chavez had been in close contact with officials in an effort to "continue driving the national plans forward".
Mr Chavez's unexpectedly long absence from Venezuela has prompted debate on whether he should delegate executive power to the vice-president.
Venezuelan officials have said he underwent emergency surgery on 10 June for a pelvic abscess, but there has been speculation in the Venezuelan and foreign press that the president's condition could be more serious.
He had been widely expected to be back in time to host the CELAC summit which also coincides with Venezuela's bicentennial celebrations.
