DOWNTOWN — The stabbing Tuesday of a homeless man sleeping on a bus bench on Santa Monica Boulevard is linked to two other attacks in Los Angeles where “death warrants” were found at the scene, police said.

Santa Monica and Los Angeles police officers are working together to try and find the person responsible for the attacks, said SMPD Sgt. Richard Lewis.

The victims, two men and a woman, all in their 50s, survived the attacks, according to the Los Angeles Police Department. Only one victim remains hospitalized.

The first incident was reported on July 4 when a 56-year-old homeless man was found bleeding with a large “hunting-type” knife protruding from his back near the intersection of Third and Main streets in Los Angeles. The man crawled 100 yards looking for help while the weapon was lodged between his shoulder blades, according to L.A. Times.

Police said a “death warrant” had been typed and signed by the attacker and left behind, but did not elaborate on the exact contents of the note.

On Tuesday, another homeless man was stabbed in similar fashion as he slept on a bus bench at the corner of Santa Monica Boulevard and Sixth Street across from the Main Library. Lewis confirmed that a similar note was found by detectives but did not go into details.

On Thursday, a 54-year-old homeless woman was stabbed in the back as she slept near the intersection of La Brea and De Longpre avenues, blocks away from Hollywood High School. Police recovered a black kitchen knife and another “warrant,” also signed by the suspect.

Authorities said that they are looking for a person of interest identified as David Ben Keyes, who has been missing for weeks from the Santa Barbara area. Police said Keyes’ name appeared on the notes but they are not sure if he was the perpetrator.

On various websites, Keyes describes himself as “a musician, and writer of original psalms, proverbs, love letters, poems and riddles for the Roman Catholic Church and Jewish Synagogue.” On his Facebook page, Keyes writes, “David current agenda: Re-structure the Holy Roman Catholic Church into a military tribunal & draftin [sic] letters & press releases in Santa Barbara.”

Anyone with information is urged to contact the SMPD at (310) 458-8495 or the LAPD Robbery/Homicide Division at (877) LAPD-24-7.

kevinh@smdp.com