A Virginian judge has denied bail for three suspects, Michael Zottoli, Patricia Mills and Mikhail Semenko in a hearing today.
The judge said she considered 'the defendants at risk of flight.'
The defence lawyers yesterday requested the bail hearing be delayed as they said they had new information.
Suspects 'Michael Zottoli' and 'Patricia Mills', a married couple who were ordered to be kept in detention along with a third suspect Mikhail Semenko, said in post-arrest statements that their given names were fake and they were Russian citizens.
'Zottoli' admitted his true name was Mikhail Kutzik and that his real birth date was different to the one given under his cover.
'Mills' confessed her real name was Natalia Pereverzeva and that her family still live in Russia.
In court prosecutors insisted to the magistrate judge that the suspects would certainly flee if freed on bond, and the judge agreed the three were 'at risk of flight.'
Prosecutors also argued the government's case has strengthened since the original complaint on Sunday unveiled the 11 alleged 'deep cover' agents for Russia were living in the US.
The court heard that a wealth of evidence has yet to be revealed, with 'well over' 100 decrypted messages between the conspirators, compared to only ten such messages mentioned in complaints so far.
In searches of Kutzik and Pereverzeva's home and rented safe deposit boxes, since their arrest, prosecutors said among other evidence $80,000 dollars in cash was found in eight envelopes.
The evidence was 'packaged in exactly the same way' as those recovered in New Jersey this week in search warrants on other suspects.
The court had been unlikely to grant the three suspects bail, with US authorities still sweating over the disappearance in the saga of eleventh suspect Christopher Metsos, who vanished in Cyprus after posting a €26,500 bond and surrendering his passport.
Cyprus Justice Minister Loucas Louca said that Christopher Robert Metsos could have fled the Greek controlled part of the divided Mediterranean island.
The Justice Minister was referring to the Greek-Cypriot south.
There was speculation that Metsos, 54, might seek to take advantage of the fact that the breakaway Turkish Cypriot north has no extradition treaties and is a well-known haven for fugitives.
In New York, Judge Ronald Ellis said Vicky Pelaez, a journalist born in Peru but who has US citizenship, could be released on house arrest with a monitoring device if someone paid the $250,000 bond, with $10,000 needed in cash.
Ms Pelaez 'does not appear to be a trained agent,' Judge Ellis said, noting that she 'has a real identity and she is a US citizen and she has an incentive to stay in the country'.
Two other suspects, Richard and Cynthia Murphy, were detained, with Judge Ellis saying 'the government evidence is strong' against the couple.
They were among ten suspects arrested by US authorities in recent days under suspicion of operating as Russian agents in the US.
A 27 July preliminary hearing date has been set for the Murphys, who were arrested on Sunday in New Jersey.
The judge meanwhile postponed a decision on Ms Pelaez's husband Juan Lazaro, who US prosecutors said confessed after his arrest to working for Russia's SVR foreign intelligence service, and that Lazaro was not his real name.
Meanwhile in Boston, US Magistrate Judge Jennifer Boal ordered suspects Donald Heathfield and Tracey Foley be held in jail until 16 July.
The court held a closed-door hearing to make care arrangements for the couple's two sons, ages 16 and 20. The couple's lawyers asked that the children's custody be discussed away from the court.
The suspects appeared in court to face charges of participating in a network of agents working for the Kremlin.
The case of the alleged 'deep cover' agents - accused of trying to infiltrate US policymaking circles - harkens back to Cold War hostilities, with the use of false identities, tales of buried money and hidden video cameras.
Russian businesswoman Anna Chapman, 28, appeared in federal court on Monday in New York and was remanded into custody without bail.
