The Health Service Executive have applied for an order over the blonde girl (7) taken from a Roma family in Tallaght yesterday.
The action was taken yesterday after a member of the public raised concerns about the child living with the family in a house in a south Dublin suburb.
No arrests have been made and the family are not facing an allegation of abduction.
It is understood authorities want one week to carry out DNA tests to confirm the young girl's identity and biological links to the Roma family.
About 20 friends and relations from the Roma community attended outside a family law court in Dublin city centre where legal proceedings took place over a care order for the child.
The Health Service Executive (HSE) sought an emergency order under section 13 of the Child Care Act 1991 after being called in by gardai. Under the legislation the child could remain in care for up to 28 days.
It is understood the action was taken after gardai believed the family were unable to prove the girl's identity conclusively.
A couple who say they are the girl's parents said she was born in a Dublin hospital in April 2006 and is their daughter.
They have several other children who have not been taken into care.
The youngster is said to be physically well and is due to be interviewed by specialist officers.
Unlike the case in Greece where a girl, known as Maria, was found in a settlement near Farsala, DNA tests have yet to be carried out.
The only similarity between the stories is that the girls are blonde-haired and blue-eyed and had a different appearance from that of the couple they were found living with.
In the Greek case, a DNA test on Maria proved she was not related to Christos Salis, 39, and Eleftheria Dimopoulou, 40, and the couple have been held on charges of abduction and document fraud.
Europol and Interpol have been contacted about missing children while investigations continue to confirm the girl's identity.
Pavee Point, a rights groups that works on behalf of Irish travellers and the Roma community, called for the girl's case to be expedited.
"Pavee Point are concerned about witch-hunts against a vulnerable community and old stereotypes of an entire community being propagated in the media coverage of this development," a spokesman said.
"Actions by the state need to be evidence based and due process needs to be accorded to all communities living in Ireland.
"There is a real danger that precipitative action, undertaken on the basis of appearance, can create the conditions for an increase in racism and discrimination against the Roma community living here."
Pavee Point said that Roma children are grossly overrepresented in state care institutions in Europe and the main underlying reasons are poverty and discrimination.
It is understood that gardai may seek to take DNA samples from the parents.
Officers spent several hours at the Dublin property yesterday after asking for the family to produce documents to confirm the child is theirs.
A birth certificate was deemed to be inconclusive and a passport bore a picture of a baby and could not be matched to the seven-year-old.
Officers have claimed that the family gave them a name and date of birth which is different to records with the registry office.
The parents claimed that the girl was born in the Coombe Hospital in Dublin, but when gardai contacted medical staff they had no record of a child with the family name being born on the date the parents claimed.
Earlier today it was revealed that the Child Protection Unit at Tallaght Garda station received a call from a member of the public concerned about a child who was living with a Roma family.
The gardai had prior dealings with the family and they decided to visit the house in Tallaght in south county Dublin at around 4:30pm yesterday afternoon to check out the report.
The couple insisted that the girl was their daughter and said she had been born in 2006.
But garda checks at Dublin city hospitals failed to produce satisfactory evidence to back up the claim and the girl's birth certificate could not be found.
Senior sources said that “serious issues around the birth certificate of the child which suggests that the Roma couple may not be her parents”.
Gardai also consulted experts to establish if it was physically possible for a Roma couple to give birth to a girl with blonde hair and blue eyes.
Gardai said this afternoon that inquiries were continuing to establish the identity of the girl.
The Tallaght case is similar to the current controversy in Greece where police have taken a little girl, known as Maria, into care and arrested a couple, who claimed to be her parents.
Gardai said there have no arrests in the Tallaght case.
The Roma couple, who have other children, have been living in the area for some time.
A spokeswoman for the HSE told The Herald she had received a large number of media queries about the matter but “no information” will be disclosed in childcare cases.
The case has some similarities to that of Maria – the young girl who has made international headlines after it was discovered that she was not the child of of Christos Salis (39) and Eleftheria Dimopoulou (40).
The four-year-old, known only as Maria, is the subject of an international police inquiry after Greek police released her photograph at the weekend, appealing for her parents to come forward.
A Roma couple from the village of Farsala in central Greece are accused of abducting her from her natural parents, whom police believe are either from northern or eastern Europe – in a case that has invited comparisons with the missing British girl Madeleine McCann.