One person was killed and four others were critically wounded in a shooting Sunday at a Southern California church, authorities said.
Deputies detained one person and recovered a weapon following the shooting at Geneva Presbyterian Church in the city of Laguna Woods, the Orange County Sheriff's Department said on Twitter.
A fifth injured person suffered minor injuries, officials said. All the victims were adults.
Federal agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives were responding to the scene.
Laguna Woods was built as a senior living community and later became a city. More than 80% of residents in the city of 18,000 people about 50 miles (80 kilometers) southeast of Los Angeles are at least 65.
Gov. Gavin Newsom's office said on Twitter that he was closely monitoring the situation.
"No one should have to fear going to their place of worship. Our thoughts are with the victims, community, and all those impacted by this tragic event," the tweet said.
The incident occurred in an area with a cluster of houses of worship, including Catholic, Lutheran and Methodist churches and a Jewish synagogue.
The shooting came a day after an 18-year-old man shot and killed 10 people at a supermarket in Buffalo, New York.