How synagogues are implementing new security measures

A candlelight vigil is held at Rancho Bernardo Community Presbyterian Church for victims of a shooting incident at the Congregation Chabad synagogue in Poway, north of San Diego, California, U.S. April 27, 2019. Credit: REUTERS/John Gastaldo.

A shooting at the Chabad synagogue near San Diego on Saturday left three people injured and one woman killed. Police are holding a 19-year-old man after identifying himself as the shooter.