Police said they used mobile phone records to track the kidnappers, according to AFP.
Four of the kidnappers were killed in the operation to rescue the boy, media reports say.
After grabbing the cash the kidnappers called back and said Anant was on the train.
Italian officials say the kidnappers may have been a criminal gang tied to the Taliban.
Seven kidnappers, including Paleokostas, were arrested in August when they tried to launder the money.
Other guests were locked in a bathroom while the kidnappers made their getaway with her.
An attempt to make a ransom drop failed when the kidnappers mistook scoop-hungry reporters for cops.
But anger is also directed at the kidnappers for picking people who were most vulnerable.
The kidnappers later released four captives but kept Hallums and Filipino accountant Robert Tarongoy.
But a show of military force in the region could put the kidnappers under further pressure.
The statement did not say whether the Cameroon government is in contact with the kidnappers.
Kidnappers could no longer insist on unmarked bills, for there would be no such things.
It resulted in the Lindbergh Law, which permitted federal authorities to chase kidnappers across state lines.
Mr Ould Kablia said the kidnappers had not entered Algeria from a neighbouring country.
BBC: Algeria siege: 'Victims' as army tries to free hostages
Peruvian kidnappers mounted labour raids, spiriting the islanders away to lives of indentured servitude in South America.
Many governments, however, including the United States, refuse to pay ransoms or make other concessions to kidnappers.
Ackerman took 11 calls from people claiming to have found the Doberman before getting the kidnappers' call.
The attorney said that his kidnappers were interested in a cassette linking Iranians to the AMIA case.
One of the kidnappers told Reuters news agency they released the hostages because their health was deteriorating.
According to Iran's Students News Agency, the kidnappers were wearing uniforms similar to those of Iraqi security forces.
His kidnappers have not made any ransom calls nor have the police been able to make a breakthrough.
Mr Wolfowitz said he believed the hunt for the kidnappers was closing in.
In 1986, kidnappers in Lebanon released the Reverend Lawrence Martin Jenco, an American hostage held for nearly 19 months.
These peaks were once the kingdom of shepherds, charcoal burners, kidnappers and bandits.
Bowers told his wife the kidnappers were seeking a ransom, the official said.
"If it had guts, it should have been able to talk to the kidnappers, " another resident, Prem Nepali, says.
It is a matter, people believe, best handled privately, as the kidnappers prefer.
The American journalist Jill Carroll is still being held by kidnappers in Iraq.
Ali, a longtime Muslim, urged the kidnappers to treat Pearl as they would want all Muslims to be treated.
The case gets personal for Taylor as he wrestles with breaking police protocol in an effort to find the kidnappers.
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