Paris (CNN) French health authorities are urging parents with young children and pregnant women to get their lead levels tested after April's catastrophic fire that engulfed Notre Dame Cathedral in the French capital.

The move was described "as a precaution" and came after the city's health authorities said they were investigating whether the fire was to blame for high levels of lead found in the bloodstream of a child living in central Paris.

On Tuesday, Ile de France's Regional Agency of Health (ARS), which covers Paris, said in a statement that it had learned that a child had been found to have levels of lead "higher than normal standards."

The health authority had said that in recent weeks, samples taken from the Ile de la Cite neighborhood -- where Notre Dame is located -- had shown that the risk to lead exposure had "largely disappeared."

However, on Tuesday, ARS said it had opened an investigation into the affected child's situation, saying it would also investigate if other factors, excluding the Notre Dame fire, could have caused a spike in the child's lead levels.