A Colorado Senate candidate's truck was shot at while she was sitting in it last week.

It's not clear if Rebecca Cranston, a Democrat running for a district that largely covers Larimer County outside Fort Collins, was targeted or if the shooting was related to other reported shootings in northwest Fort Collins.

Cranston had just pulled into her driveway Wednesday night and was on her phone when she heard something hit her truck. She first thought it might have been a rock.

"It didn't occur to me that it would be a gunshot at first, until we saw the bullet hole," Cranston said Monday morning.

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The bullet struck the driver side of the tailgate, punched diagonally through camping gear in the back and struck the passenger side wheel well. Cranston reported the shooting to the Larimer County Sheriff's Office.

Deputies found the bullet and took it in for testing to determine what type of weapon it came from, Cranston said.

Sheriff's office spokesman David Moore said police are still in the initial stages of the investigation of Wednesday's shooting, but it so far appears to be random in nature. The sheriff's office and Fort Collins police are also investigating two other shootings from May and June in that area and are working to determine whether they are related.

The other shootings occurred within a couple of miles of each other. On June 9, deputies responded to a home in the 500 block of North Impala Drive. Someone shot at a person's home and a caller reported finding multiple bullet holes. No one was injured in the incident.

Moore said Fort Collins police are investigating a May shooting with similar circumstances within a couple of blocks of the North Impala Drive incident. Fort Collins police did not return a request for comment Monday. A Fort Collins police incident log shows a reported shooting on May 7 in the 1200 block of Gold Drive, less than 2 miles from the June shooting.

Moore said no suspects are yet identified in the shootings the sheriff's office is investigating, but he recognized the concern members of the public may have, especially after a spate of unsolved Northern Colorado shootings in 2015 and reports of shattered windows on the interstate.

The Northern Colorado Shooting Task Force has been advised of the shootings, he said, and is considering the cases as it does other tips and investigative leads. However, law enforcement officials have not tied the incidents together.

Cranston wondered if she was targeted in Wednesday's shooting because of her campaign, though she did not accuse her opponent of having anything to do with it.

However, she accused supporters of Republican Rob Woodward's campaign of harassment tactics such as staking out her house and at one point almost driving her off the road while fleeing earlier in the summer. She said her mail — including campaign donation checks — was also stolen around that time.

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She accused the Woodward campaign of setting an "anything goes" campaign and worried someone else may have taken it a step further.

"I don't really feel safe here, frankly," Cranston said.

The Woodward campaign offered sympathy to Cranston because of the shooting but denied allegations that anyone from their team staked out her house.

"That's awful that somebody shot at her car," Campaign manager JD Key said. "That's terrible. I definitely don't wish that on anybody. That's scary."

Key said the Woodward campaign took a photo of Cranston's home early on in the election only to settle a question about district residency.

"This idea that we're running some kind of rough campaign is completely not true," Key said. "We're doing the same thing most campaigns are doing: Spending time knocking on doors, having meet and greets and talking to people about the issues."