Serial killer may be behind killings of five men in central California

Police are left baffled as to why the victims were targeted and have announced a $95,000 reward for information leading to an arrest

A serial killer may have ambushed five men in central California separately in recent months, shooting them to death alone in the dark, and police are baffled as to why the victims were targeted.

None of the men were robbed or beaten before their killings - which all took place within a radius of a few square miles - and none appear to have known each other, Stockton police officer Joseph Silva said on Monday. The shootings do not seem to be related to gangs or drugs.