LOS ANGELES, May 15 (Reuters) - A gunman opened fire in a Southern California church during a lunch banquet on Sunday, killing one person and wounding five, before churchgoers detained the suspect and hog-tied his legs with an electrical cord, authorities said.

local time (2039 GMT) at the Geneva Presbyterian Church in Laguna Woods and arrested an unidentified suspect in his 60s, Orange County Undersheriff Jeff Hallock told a news conference.

The Geneva Presbyterian Church is pictured after a deadly shooting, in Laguna Woods, California, U.S.

"At this time, we do not know what the suspect's motive may be or whether he had an intended target, or whether this is even a hate-related incident," Hallock said, adding that authorities believe the suspect does not live in the area.