REDWOOD CITY (CBS SF) – A 53-year-old woman fatally stabbed in unincorporated Redwood City early Tuesday morning has been identified by the San Mateo County coroner’s office as Katayoun Fomanimaskan.

Deputies responded at 5:08 a.m. to calls about a disturbance at a home in the 500 block of Sequoia Avenue and learned that Waley Cheong, a 23-year-old San Francisco man, had entered the residence and allegedly stabbed Fomanimaskan as well as a 65-year-old man and 20-year-old woman.

During the altercation, one of the residents confronted Cheong, who was also stabbed. Fomanimaskan and Cheong both succumbed to their injuries and the other two victims were taken to a hospital for treatment, county sheriff’s officials said.

“What we learned once we got on scene was that the suspect was also stabbed and he had died prior to law-enforcement’s arrival,” said Det. Rosemerry Blankswade from the San Mateo County Sheriff’s Office.

Investigators say Cheong entered the home uninvited before before attacking his victims. Those victims, however, were able to fight back.

“They attacked the suspect himself and he was stabbed in the process,” Blankswade said.

Outside scene of homicide in Redwood City (CBS SF)

Cheong was arrested in May for stalking and making felony threats, the sheriff’s office says that arrest was connected to the same family.

“It is in relation to the same family,” Blankswade explains. “But we are still looking in to what the actual relationship or friendship might have been with one of the victims.”

Investigators learned Cheong was a former acquaintance of one of the victims, but a motive for the attack has not been released by the sheriff’s office.

Anyone with information about the case is encouraged to contact Detective Fava at (650) 363-4192 or jfava@smcgov.org.

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