FBI agents joined state and local police in New Hampshire in the search for a missing Maine woman whose 14-month-old child was found inside her still running car, authorities said on Tuesday.
Krista Dittmeyer, 20, of Portland, Maine, has been considered a missing person since her black Nissan Sentra was found early Saturday morning in a New Hampshire recreational facility parking lot. The car was idling with flashers on and the baby inside, police said.
Police said Tuesday there's nothing to suggest she's not alive.
Conway Police Lt. Chris Perley said the father of Dittmeyer's baby is not a suspect because he was not in the area. He declined to comment on reports of blood being found in the car.
Police earlier said they believe she was the victim of a crime.
Dittmeyer, a waitress, spoke to her family by telephone on Friday night and nothing was amiss then, NBC News reported.
The FBI joined an investigation already under way by New Hampshire State Police and the Conway Police Department.
Search teams with dogs scoured the area surrounding the Mount Cranmore Resort in Conway, said Perley.
A nearby retention pond with murky water was drained on Monday, but nothing was recovered, he said.

Authorities have taken aerial photos of the scene and have seized Dittmeyer's car and another vehicle in connection with the investigation, Perley said.
Police are also analyzing her cell phone records in an attempt to piece together her whereabouts prior to her disappearance, Perley said.
Dittmeyer's last contact with her family was Friday night by phone, officials said.
After being found in the car, her child was evaluated at a local hospital and placed in the care of family.
Although Dittmeyer knows people in Conway, authorities have not yet said why she may have been in the state, but Perley said that was "an important aspect of the investigation we are looking into."
Media reports of blood found in Dittmeyer's car that were attributed to a local sheriff were not confirmed by Conway Police. Perley said the sheriff is not part of the investigation and the police department does not comment on specific information in an ongoing investigation.
Dittmeyer's mother, Lanell Shackley, on Monday told WBZ-TV in Boston there's no way her daughter would ever leave her baby.
Sister Kayla Dittmeyer pleaded with the public to help in the search.
"I'm just waiting for her to show up," she told TODAY. "I feel like it's not real. If anyone remembers seeing her at any point at all, just please let us know any details."