(Updates with suspect slain, girl rescued)
SALMON, Idaho, Aug 10 (Reuters) - A California man suspected of killing his longtime friend and her son and abducting her 16-year-old daughter was killed in Idaho on Saturday as authorities were attempting to arrest him, the San Diego County Sheriff said.
The girl, Hannah Anderson, was rescued apparently in good health and taken to a hospital, San Diego County Sheriff William Gore said at a news conference.
More than 150 law enforcement officers on foot and on horseback had descended on the central Idaho wilderness in search of James Lee DiMaggio, 40, after a group of backcountry horsemen told police that they had spotted the pair on Wednesday.
The telecommunications technician is wanted in the killing of Christina Anderson, 44, and 8-year-old Ethan and in the disappearance of Hannah, all of whom were last seen last Saturday, the day before DiMaggio is suspected of setting his house on fire in the Southern California community of Boulevard, triggering a multi-state search.
The San Diego County Sheriff confirmed late on Friday that the remains of a second body found at the house were Ethan's. Police declined to say how Christina Anderson or her son were killed. (Reporting by Laura Zuckerman and Dan Whitcomb; Writing by Dan Whitcomb; Editing by Scott Malone and Sandra Maler)