By Elinda Labropoulou and Laura Smith-Spark
ATHENS (CNN) -- About 10 cases of missing children are "being taken very seriously" in connection with the suspected abduction of a girl by a Roma couple in Greece, a spokesman for a Greek children's charity said Tuesday.
"They include children from the United States, Canada, Poland and France," said Panagiotis Pardalis of the Smile of the Child charity.
In a case that has generated huge interest in Greece, authorities have charged the Roma couple with abducting the child they call "Maria." They appeared in court Monday and were remanded into custody pending a trial.
A lawyer for the couple says the pair adopted the child from her biological mother.
The Smile of the Child said the girl, who was found Thursday in a Roma community near Larissa, central Greece, is now being cared for in a group home.
Medical tests carried out on the girl since she was found indicate she is between 5 and 6 years old, slightly older than initially thought, said Pardalis.
Police have said they are suspicious of the records the couple provided for the child and for other children in their care. In addition to the abduction charge, the couple are accused of falsifying official documents.
Four officials, including the head of the registry office from which Maria got her birth certificate, have been suspended while a police investigation is under way, the media office of the Athens municipality said Tuesday.
The girl received the document this year, it said. It is unusual for a birth certificate to be issued years later.
Authorities asked questions about Maria because she has fair skin and blond hair, while her parents have darker complexions typical of Roma, also known as gypsies, a race descended from Indian nomads who face widespread discrimination in Europe.
Haralambos Dimitriou, head of the local Roma community, said the couple took the girl in because her Bulgarian mother couldn't keep her. He said Maria was raised like a "normal" child.
Pardalis said Sunday that she was found in "bad living conditions, poor hygiene."
Thousands of calls poured into Greece after authorities released photos of the girl last week.
Authorities released photos of the two adults Monday, hoping the publicity would reach someone who can provide more information about them.
Police said the blond child looked nothing like the man and woman with her, and DNA testing confirmed that they were not her biological parents.
A police statement said the couple "changed repeatedly their story about how they got the child."
A government news agency said police found suspicious birth and baptism records as well as family registrations that claimed the woman had given birth to 10 children and the man was the father of four more.
Prejudice against the Roma
Prejudice and discrimination against the Roma are widespread in Greece and elsewhere in Europe, Amnesty International says.
Maria's case plays into old prejudices about them stealing children for forced labor.
Pardalis mentioned such a possibility, saying, "We don't have any other information if this girl was forced to work or to beg on streets."
And the government news agency raised "the possibility of the existence of a ring bringing pregnant women to Greece from Bulgaria and then taking their children for sale." The agency also cited past "reports" that empty coffins were found for infants who supposedly were stillborn to foreign mothers in Athens.
CNN's Elinda Labropoulou reported from Athens and Laura Smith-Spark wrote in London. CNN's David Simpson contributed to this report.
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