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The San Mateo County coroner’s office has identified three of the four people killed in Thursday’s explosion and fire in San Bruno.

Two of the victims, a mother and daughter, were identified as 44-year-old Jacqueline Greig and 13-year-old Janessa Greig.

Another victim was identified as 20-year-old Jessica Morales.

The coroner’s office is still working to identify the fourth victim.

Jacqueline Greig is survived by her elderly parents, husband and older daughter, according to an e-mail sent on behalf the family.

The family members have “suffered greatly through this ordeal and have also been devastated by this loss,” the e-mail said.

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