AUBURN – A sex offender who failed to disclose his whereabouts to authorities after he moved out of his Auburn home was arrested Friday night after a tip led police to a mobile home in Oxford, police said.

Police had secured an arrest warrant for Keith Lowndes, 45, who was convicted of molesting children in California in 1991.

He was wanted for failing to register as a sex offender, a Class D misdemeanor, police said.

Police had tracked him first to Poland, but just missed making contact with him, Auburn police Lt. Tim Cougle said. Oxford police discovered him at a mobile home off Lynn Street, where they arrested him, then turned him over to the Androscoggin County Sheriff’s Department, which brought him to Androscoggin County Jail, Cougle said.

Auburn Police Chief Phillip Crowell instituted a program earlier this year to monitor sex offenders living in the city by assigning one officer to each offender. At least once a month, the designated officer is expected to verify the residence of the assigned sex offender and to note any possible violations of the offender’s terms of release.

As part of the program, an officer checked on Lowndes recently, only to find him missing.

A designated officer also is expected to hand out sex offender notification fliers to neighbors and answer their questions, police said in a news release.