Three suspects in the killing of a Marin County yoga teacher have been linked with the death of a woman found in Golden Gate Park on Saturday, San Francisco police said Thursday night.

Audrey Carey, a 23-year-old Canadian woman who was backpacking across the West Coast for two weeks, was found dead on Oct. 3 near the Golden Gate Golf Course with blunt force trauma to her head.

Now, San Francisco police say she was allegedly shot and killed by three suspects recently arrested in Oregon. The trio were already being held on suspicion of fatally shooting a man in Marin County.

On Monday, 67-year-old Steve Carter was found shot to death beside his dog on a hiking trail west of Fairfax. Carter had been shot multiple times, and his dog had also been shot, but was not killed. The dog was found leashed to Carter’s dead body, and his car was missing.

After hearing of the Monday killing, homicide inspectors from San Francisco contacted Marin County Sheriff’s investigators because the two killings appeared similar and happened within days of one another.

Both slayings were shootings, though police had only said Carey suffered head trauma. Both killings also happened in wooded areas.

Marin County investigators meanwhile used a GPS device in Carter’s car and tracked it to Portland, Ore., where three suspects were arrested and questioned. The three suspects — two men and a woman – had Carter’s car when they were taken into custody Wednesday at the St. Francisco Dining Hall in Portland.

The trio included Morrison Haze Lampley, 23, Sean Michael Angold, 24, and Lila Scott Alligood, 18. They have no known addresses, according to authorities.

The trio were also questioned by two San Francisco homicide inspectors who had flown to Portland, according San Francisco police Sgt. Michael Andraychak.

Carey’s property was found in the possession of the suspects when they were arrested, which linked them to her death, Andraychak said.

Carey’s body was discovered by a passerby around 9:15 a.m. near Bernice Rodgers Way and John F. Kennedy Drive, close to the Golden Gate Park Golf Course, authorities said. Police and paramedics arrived afterward.

Carey was found about two hours before Saturday’s first act performed at the Hardly Strictly Blues Festival. It is believed that Carey attended the festival on Friday night.

A family friend told the San Francisco Examiner that Carey was backpacking across the West Coast from her hometown outside of Montreal, Quebec, and was in the San Francisco area for the last week of her approximately two-­week trip.

Marin County sheriff’s Capt. Dave Augustus described the three suspects as drifters and said a motive was unknown.

Lampley, Angold and Alligood were booked into the Multnomah County Jail on murder warrants and will be arraigned on Friday, Oct. 9, in Multnomah County Court, according to police.

The Associated Press contributed to this report.