Iran's World Cup soccer team set off from Turkey for their training base in Mexico on Saturday, with some members of their entourage reportedly still without U.S. visas, before three group matches in the U.S. later this month.

The Iranian Football Federation's secretary-general, Hedayat Mombeini, and its vice president, Mehdi Mohammad Nabi, were among 14 backroom staff and officials without U.S. visas before games in Los Angeles and Seattle, according to Iranian state television.

It was unclear whether the federation's president, Mehdi Taj, had been issued a visa.

The team's participation in the World Cup has been complicated by the Iran war. Problems with processing visas had earlier led Iran to move its training base from Tucson, Arizona, to Tijuana, Mexico, which is on the border with California.

The federation accused the U.S. of "vindictive behavior" in refusing visas for "key managerial and administrative members" of the team.

The decision had "effectively denied the Iranian national team the opportunity for a level playing field and a competition free from discrimination," according to a statement on the federation's website. It added that the federation would pursue the matter through world soccer authority FIFA.

The Iranian Embassy in Ankara, meanwhile, responded to an earlier social media post from U.S. Ambassador Tom Barrack, in which he congratulated his embassy staff for processing the Iran team's visas.

"You cannot whitewash conduct that violates FIFA regulations and breaches the United States' host obligations merely by praising yourselves," the Iranian post read. "This represents the worst possible form of politically biased interference in sport."

One U.S. official earlier told The Associated Press that all players on the Iranian team were approved for visas, while a second official said visas had been issued for players, coaches, trainers and some support staff. A third official suggested that some applicants affiliated with the team had been rejected for requesting visas "under false pretenses."

The officials spoke on condition of anonymity because they weren't authorized to discuss the visas publicly.

The squad has been preparing for the World Cup at a training camp in Antalya. The team said that it has already received visas from the Mexican Embassy in Ankara.

The players, dressed in blue blazers over white T-shirts, left the luxury Mardan Palace hotel in Antalya on Saturday afternoon. They boarded a private jet at the Mediterranean city's airport and were due to fly directly to Mexico.

Iran plays its first two games in Inglewood, California, against New Zealand on June 15, and Belgium six days later, then heads to Seattle to face Egypt on June 26. Iran and the U.S. could meet in the round of 32 on July 3 in Arlington, Texas, if both teams come second in their groups.

In March, President Trump had discouraged Iran from participating in the tournament, saying he didn't think it was "appropriate" and raising concerns over players' "life and safety." A day later, Iran's national team pushed back, saying "no one can exclude" it from playing.

At one point, Iran attempted to move its group games from the U.S. to Mexico.

FIFA President Gianni Infantino has repeatedly said that Iran will participate. On April 30 in Vancouver, Canada, while addressing the FIFA Congress — an annual meeting which involves FIFA representatives from more than 200 nations — Infantino opened his remarks by "confirming, straight away, for those who want to say something else or write something else, that of course Iran will be participating at the FIFA World Cup 2026. And of course Iran will play in the United States of America."

Iran finalized its team on Monday, including 17 home-based players whose clubs haven't played since February because of the war. Star forward Sardar Azmoun was dropped in March, reportedly because of a social media post that angered Iranian authorities during the war.

Iran's sports minister said in March that it would "not be possible" for the team to participate in the World Cup, but the republic's soccer federation said in May that it was moving ahead with a team.

The federation had insisted that all players and staff be granted visas, including those who had military service in the Islamic Revolutionary Guard Corps.