An Argentinian judge put a hold on another court's decision to permit the first gay marriage in Latin America, but supporters of the couple said they would try to go ahead with the ceremony today anyway.
The official court web site said national judge Marta Gomez Alsina ordered the wedding blocked until the issue can be considered by the Supreme Court.
Jose Maria Di Bello and his partner, Alex Freyre, had planned to wed later today based on an earlier ruling by a city judge in Buenos Aires.
"They are shocked and saddened by the news, but still have hopes that the wedding will go forth as planned," said Maria Rachid, president of the Argentinian Federation for Lesbians, Gays, Bisexuals and Transsexuals who coordinated the team of lawyers that filed the couple's suit.
Ms Rachid said the couple had not been officially notified of yesterday's order and would appear at the marriage registry today.
"If the civil registry where the wedding was to take place refuses to go through with the ceremony, the gay community will organise a protest," Ms Rachid said.
The court website said the civil registry where the wedding was to take place had been notified of the latest ruling.