The U.S. said on Thursday it is disappointed that the suspected spy arrested in Cyprus was released on bail, who disappeared afterwards.

Russia-U.S. spy scandal

"We are disappointed that Christopher Metsos was released on bail following his arrest in Cyprus. As we had feared, had been given unnecessarily the chance to flee, he did so," U.S. State Department spokesman Philip Crowley said.

"But I'm sure we will be in touch with the Cypriot government. I'll see if we have already launched, or filed our concern and our protest," Crowley said.

U.S. Justice Department announced on Monday that authorities had busted a spy ring suspected of conducting long-term, "deep- cover" espionage for Moscow.

An undated handout picture released by the Greek Cypriot police on July 1, 2010 shows 54-year-old Christopher Metsos, a key suspect in the Russia-US spy scandal who was arrested at Larnaca airport in Cyprus on June 29, 2010 after immigration officers discovered his name on a stop list. The disappearance of Metsos provided a stunning twist to a Cold War-style espionage saga that has threatened to upset major efforts to reset ties between Washington and Moscow. [Xinhua]?

Ten suspects have been arrested in the U.S. The other suspect, a Canadian man arrested in Cyprus, went missing on Wednesday, just over 24 hours after a judge let him free on bail.