An autopsy will be performed Tuesday on an 11-year-old girl that was found in the Connecticut River.  Authorities said that the death was "suspicious" although no signs of struggle were found in her West Stewartstown, N.H. home.

Celina Cass was last seen July 25 at 9 p.m. in her bedroom using her computer, said authorities.

"We have brought Celina home, obviously not the way we wanted to bring her home," said New Hampshire Senior Assistant Attorney General Jane Young Monday.

Divers found the body Monday morning near a hydroelectric dam near the Canadian border.

It is still unclear whether any suspects have been identified.

The autopsy is being performed in order to determine cause and manner of death.           

Adam Laro, Celina's father, told Fox News that the girl was "shy but very friendly" and that she would not leave on her own.  "I can't picture why she would leave at night," said Laro.  Laro was in the hospital when Celina was last seen.

Celina's stepfather Wendell Noyes, who reportedly suffers from schizophrenia, was taken to a hospital Monday morning although it remains unclear why.

The FBI offered a $25,000 reward for information leading to arrest in the little girl's disappearance last week.  A private citizen offered $5,000 for information leading to the girl's return.