American "hikers" Shane Bauer, left, and Josh Fattal, right, were supposed to be in court earlier this month, but at the last minute the trial was delayed.
Iran scoffed Tuesday at the U.S. and allies using the term hikers to describe three Americans charged with espionage, calling it a "joke" and giving no hint that prosecutors would scale back the accusations.
The comments carried on state TV suggest Iran will not ease its claims against the Americans and former UC Berkeley students despite failing to hold a court session earlier this month for unexplained reasons.
The trio was detained in July 2009 along the Iran-Iraq border. Two men, Shane Bauer and Josh Fattal, remain in custody. Bauer's fiancee, Sarah Shourd, was released last year on $500,000 bail and has refused to return to Iran for trial. She is being prosecuted in absentia.
They deny the spy charges and claim they were only hiking in a scenic area of northern Iraq near the Iranian frontier.
"They are not hikers and insistence by the U.S. officials and their friends, who try to identify them as hikers, is not acceptable," said the TV report, quoting Foreign Ministry spokesman Ramin Mehmanparast.
He added: "This is a joke interpretation of the word hiker."
Mehmanparast also reiterated Iran's claim that Iranians were in U.S. prisons without access to family and diplomatic aid. Iran and the U.S. have no official relations, but third countries handle their diplomatic affairs.
The espionage trial had been scheduled to resume May 11, but Bauer and Fattal weren't brought to court and the session was called off. Iranian officials have offered no explanation.
On Monday, the families of the two men said they made phone calls to their families. It was their first phone call to their families since Nov. 27.