US prosecutors have denied any cover-up in the case of an Israeli government official who was arrested in a child sex sting operation and then allowed to leave the country.

Tom Artiom Alexandrovich, the executive director of the Israel Cyber Directorate, was taken into custody in Las Vegas this month when he arrived for what he thought was a date with a 15-year-old girl.

He allegedly brought a condom with him to the rendezvous, which he believed would include a visit to see Cirque du Soleil on the Las Vegas Strip.

Alexandrovich was charged with soliciting a minor for sex and released on $10,000 bail after being ordered to appear in court on August 27.

He returned to Israel shortly after posting bail.

Online criticism swelled over the decision to allow a person facing potentially 10 years in prison to leave the country.

Republican congresswoman Marjorie Taylor Greene criticized the handling of Alexandrovich's case and questioned why he was allowed to return to Israel without being prosecuted.

The State Department denied any intervention in the case, stating that Alexandrovich did not claim diplomatic immunity and was released by a state judge pending a court date.