BEIJING — Assistant Ron Larsen has taken over as interim head coach of the U.S. men's volleyball team after coach Hugh McCutcheon's in-laws were attacked at a popular Beijing tourist site.

McCutcheon's father-in-law, Todd Bachman, was fatally stabbed Saturday while at the 13th-century Drum Tower. His mother-in-law, Barbara Bachman, is in serious condition at a hospital.

Larsen, formerly the head coach at UC San Diego, is in his fourth season with the U.S. men's national team. The U.S. team was scheduled to open its Olympic competition later Sunday against Venezuela.