At least 10 men have been injured in seemingly random attacks by a mystery assailant in Waltham, Massachusetts, a suburb of Boston.
The unknown attacker smashes victims in the head after dark, usually from behind, leaving severe injuries, including broken noses, cracked skulls, fractures of the orbital bones that frame the eyes, facial lacerations. Some victims have been hospitalized.
Police believe the attacker is wielding a blunt object of some sort as a weapon.
"We don't believe it can be just someone's fist," Waltham Police chief Keith MacPherson said.
The attacks began November 10 and the latest occurred November 27. Victims have all been in their 20s through 40s and are of various ethnic backgrounds.
Police have surveillance footage of a person they say is a suspect, and report they have identified a few people of interest. A mask or a tightly pulled hoodie always obscure the criminal's face. Victims have been unable to describe the person, who always disappears quickly. Law enforcement is offering a $5,000 reward for information that paves the way for an arrest and conviction.
"... we're scared," said Amos Frederick, a 37-year-old who lives in an apartment complex where several attacks occurred. "All of us stay indoors except during the day. If someone is just walking to their car, we watch out for them."
Police said the motive is unclear.
"The motive is somewhat in question but it appears to be a thrill of the assault, or someone who's very violent and enjoys seeing someone hurt by this," MacPherson said. "There's never been a robbery. It's always been just an assault and the assailant takes off."