LOS ANGELES—Los Angeles-area law enforcement authorities are monitoring local Jewish houses of worship following a 12-hour standoff with a suspect at a synagogue in suburban Dallas who held four people hostage before he was shot and killed. All of the hostages, including a rabbi, were released unharmed, Texas authorities said late on Jan. 15. They did not disclose whether the suspect was killed by law enforcement officers or a self-inflicted gunshot. “Grateful the hostages are safe,” Los Angeles Police Chief Michel Moore tweeted. “@LAPDHQ has worked to communicate with our local Jewish & Muslim community leaders thru out the day and augmented patrols. We remain in close contact with our Federal Intel partners for any potential connection to LA.” No threats were reported in Southern California. The armed suspect entered Congregation Beth Israel synagogue in Colleyville, Texas, outside the Dallas/Fort Worth area, shortly after 10:30 am Saturday while services were being …