San Francisco police probing two weekend homicides

San Francisco police are investigating separate stabbings over the weekend in the Mission District and Chinatown that left two men wounded, including one with life-threatening injuries. San Francisco police are investigating separate stabbings over the weekend in the Mission District and Chinatown that left two men wounded, including one with life-threatening injuries. Photo: Spencer Platt / Getty Image, Getty Image Photo: Spencer Platt / Getty Image, Getty Image Image 1 of / 28 Caption Close San Francisco police probing two weekend homicides 1 / 28 Back to Gallery

Two men were killed in unrelated homicides in the Bayview and the Excelsior neighborhoods of San Francisco on Sunday, police say.

The first slaying happened at Mission Street and Excelsior Avenue in the Excelsior district just after 9 am.

The victim was identified as 58-year-old Marco Diaz Perez of San Francisco, according to Christopher Wirowek, deputy director of the San Francisco medical examiner’s office. Wirowek also referred to the death as a stabbing.

Police don’t know what weapon was used, and Perez was dead when they arrived.

In the second incident, around 12:30 p.m., a 27-year-old man was shot at Third Street and Armstrong Avenue in the Bayview. He was taken to the hospital, where he was pronounced dead on arrival.

No arrests were made or suspects identified in either killing.

Police were not releasing additional information on the homicides Monday, according to Officer Giselle Talkoff, a San Francisco Police Department spokeswoman.

Filipa Ioannou is a San Francisco Chronicle staff writer. Email: fioannou@sfchronicle.com Twitter: @obioannoukenobi