The body of a girl born in 2001 was found in the town of Kerava early on Wednesday morning, according to local law enforcement.
Police said the victim's body showed signs of having suffered violent injury.
One man was apprehended by police on the same day in connection with the incident. Initially police considered a manslaughter charge against the man, but the charges were upgraded to murder, according to news service STT.
Vantaa District Court ordered the man, who was born in 1986, to be remanded in custody on suspicion of murder on Friday.
Police said they believe the violent act took place in an apartment building in the centre of Kerava.