LONGMONT, Colo. -- The Boulder County Coroner is investigating the death of six-year-old Lluvia Espinoza Morales.
The girl's family says she had flu-like symptoms when they took her to Longmont United Hospital at 8:30 Monday morning.
She was pronounced dead at the hospital, but doctors do not yet know the cause of death.
Officers had to document the girl's home environment for the coroner, and as a precaution, they dressed in full hazardous materials suits when they went inside.
"If it was the flu, and it did kill a child, then we don't want it spreading to other people and we have to take precautions," said Detective Commander Tim Lewis with the Longmont Police Department.
Other residents were not evacuated and officers say there is no risk to the public.
The scene was quite strange to neighbors, who are still trying to deal with the fact that the little girl is gone.
"I have a four-year-old who used to play with them, and it's a little bit scary to find out a little girl just died," said Chloe Dominguez.
It could be weeks before the coroner determines a cause of death.