AUGUSTA, Maine - Two registered sex offenders were fatally shot in their central Maine homes Sunday morning, and a Canadian man sought in connection with the slayings shot himself that night after being cornered by Boston police, Maine authorities said.

Stephen A. Marshall, 19, described by Maine State Police as a "person of interest'' in the case, was in critical condition at Boston Medical Center, a spokesman said. Massachusetts state police referred questions about the incident to the Suffolk County District Attorney's office, which did not immediately disclose details about the shooting.

The shootings of Joseph L. Gray, 57, of Milo, and William Elliott, 24, of Corinth, led state police to take down the Maine Sex Offender Registry Web site as a precaution, state Department of Public Safety
spokesman Stephen McCausland said. The site lists the photos, names and addresses of more than 2,200 sex offenders.

The pickup truck Marshall was driving was spotted leaving one of the victims' homes after the shooting, Maine police said. They alerted authorities in Boston, about 250 miles south of Milo, after discovering
the vehicle abandoned and bullets linked to Marshall in the bathroom of a bus station, McCausland said.

It was not immediately clear if or how Marshall knew either Gray or Elliott, or if the three men had any connection with one another, McCausland said.

Marshall, who lived in Cape Breton, Nova Scotia, had come to Houlton, Maine, for the first time to meet his father, McCausland said. He added that Marshall was driving his father's pickup.

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