BANGOR, Maine — An anonymous caller notified police last week that a Bangor woman had left her two children home alone, and police arrested and charged the mother when she arrived home, Bangor police Sgt. Paul Edwards said on Monday.

Shannon M. Bragg, 33, was charged with endangering the welfare of a child at about 9 a.m. Oct. 9 after police went to her Bolling Drive residence at 6 a.m. and discovered the children alone, the sergeant said.

The unnamed caller told police that “an 11-year-old and a 12-year-old had been alone for two days,” Edwards said. “They [responding officers] did in fact find this 11- and 12-year-old alone.“

Police began to search for Bragg shortly after arriving at her home, to no avail, and at around 7:30 p.m., called the Department of Health and Human Services to take custody of the children, Edwards said.

At 8:15 a.m., Bragg, who is on probation, made contact with police and shortly afterward arrived at her home and was arrested for child endangerment and violating her probation.

Bragg told police, “She left the kids alone to go be with a friend,” Edwards said, reading from Officer Kim Donnell’s report.

Bragg, who once lived in Aroostook County, is on probation for a drug trafficking conviction from 2009, according to court listings printed in the Bangor Daily News.

She was sentenced in May 2009 in Aroostook County Superior Court to eight years in prison, with all but two years suspended, for unlawful trafficking in scheduled drugs, with three years of probation tacked on after she finished her prison term, BDN archives state.

At the same time, she was sentenced for a second drug trafficking charge that resulted in a concurrent two-year prison sentence, as well as operating a motor vehicle with a suspended or revoked driver’s license and violating condition of her release, the court listings state.

Bragg also was convicted in Aroostook County Superior Court for stealing drugs and in January 2006 was sentenced to 18 months in prison, with all but 30 days suspended.

She was taken to Penobscot County Jail after she was arrested in Bangor and remained in jail Tuesday, a week after her arrest, a jail official said.

The two children who were removed from Bragg’s home remained in the care of the state.