Once again, a man has opened fire on a house of worship. In this case, the suspect — whom police say was working alone — shot four people at a California synagogue.

Those injured were worshiping at a Chabad synagogue in Poway, near San Diego.

The violence, reported shortly before 11:30 a.m., took place at Chabad of Poway, which had promoted an 11:00 a.m. “Passover Holiday Celebration” online. The Chabad synagogue serves as a community center for ultra-Orthodox Jews. The extent of the injuries were unknown. Motive was also unclear.

The lone suspect in the case has apparently been detained, though we don’t know many more details. What is clear is that this is only the latest mass shooting at a place of worship. It occurred when people were trying to worship freely but weren’t given that chance. It occurred on the last day of Passover. And it occurred exactly six months after the mass shooting at the Tree of Life synagogue in Pittsburgh.

The four victims were taken to a nearby hospital.

***Update***: One victim has died, according to news reports.

(Screenshot via MSNBC)

