DALY CITY — Two suspects have been arrested in connection with a triple shooting that left a man and woman dead in an unincorporated pocket of Daly City on Sunday night, authorities said.

The shooting was reported just before 9 p.m. on the 1600 block of Hillside Boulevard, near the Hillside Market, according to the Broadmoor Police Department.

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Vanessa Guillory, 21, of San Francisco, was pronounced dead at the scene and Michael Garcia-Salem, 22, of Half Moon Bay, died after being transported to San Francisco General Hospital.

A third person who was shot is expected to survive.

An investigation culminated in the arrests of Devin Lum, 20, of South San Francisco, and Dorian Duff-Guardado, 23, of San Francisco, on Monday. Lum was booked into San Mateo County jail on murder charges and Duff-Guardado on accessory to murder charges.

The suspects will make their first court appearance Wednesday afternoon, said San Mateo County District Attorney Steve Wagstaffe, who declined to discuss a possible motive and other details about the case until then.

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The unincorporated pocket of Daly City where the killings took place is not part of Broadmoor Village, which sits a mile west, but is served by the Broadmoor Police Department.

The homicides are the first in an area served by the Broadmoor Police Department since 1987, when a person was shot to death during a home-invasion robbery, said Wagstaffe, who prosecuted the case.

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A look at the little Bay Area hamlet where shootings took two lives this weekend San Mateo County Supervisor David Canepa, whose district includes Broadmoor Village, lauded authorities for their quick work and voiced sympathy for the families of the victims.

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“Two families are left scarred forever and two bright futures have been wiped away by this senseless act of gun violence,” Canepa said. “My condolences to the families. They deserve justice.”

Anyone with information about the case can contact police at 650-363-4915. Those wishing to remain anonymous can call the San Mateo County Sheriff’s Office tip line at 800-547-2700.