Authorities are searching the Maple Grove home of a girl who disappeared 25 years ago at age 13, but they are not saying what prompted the search or what they're looking for.

Maple Grove police, the FBI and sheriff's deputies began searching the home Sunday where Amy Sue Pagnac used to live and were still at the scene Tuesday, Police Captain Keith Terlinden said at a news conference.

Terlinden said authorities are not naming suspects and no digging has been going on at the home. He said new technology available today could help turn up more information in the case.

"We are working hard to bring Amy home," he said Tuesday, according to Minneapolis TV station KSTP.

Amy disappeared from an Osseo gas station in August 1989. Her stepfather had stopped to use the restroom, and he told police she was gone when he returned.

Her mother, Susan Pagnac Sr., said earlier this week that she wasn't sure what led authorities back to her home or whether police considered her a suspect. She said she was just glad authorities were stepping up their investigation.

"I have been trying to get law enforcement to do things for 25 years now, and having the fact that they're going to do something, even if it doesn't make much sense to me, is wonderful," Pagnac said.