GRESHAM, Ore. -- A 9-year-old girl reported missing Monday night was found safe Tuesday and reunited with her family.

Elisa Salmeron was found in an empty house with several other children, two of them runaways, police said.

"A neighbor of the house where she was, said they recognize the people from this video and we think the little girl is with these people," said Gresham Detective Adam Baker. "We rushed over there and found her on the porch."

Police earlier said that Elisa was last seen by her family at around 9:30 p.m. Monday at her home near 162nd Avenue and Burnside Street. Later, police said the family told them she went to take out the trash at about 11 p.m., then vanished. No explanation was offered for the time discrepancy.

At about 11:30 p.m., she appeared in TriMet footage showing her on a MAX platform near the apartment complex, Gresham police said.

She apparently bought a ticket with the help of three people, boarded a westbound train, and the group got off the train together at the 148th Avenue station and walked away.

She was found in an empty home near 142nd and Burnside, police said. There were three other children in the home, including a pre-teen, police said. A family member of one of the teens said the kids broke into the house and stayed there overnight.

Baker said there was no indication of any crime. The girl had a suitcase with her, but police were not sure if she planned to run away from home.

Photos: Missing Gresham girl

The Department of Human Services will be following up with the Salmeron family to make a safety plan and make sure everything is good at home, so this doesn't happen again.