By Bud Gillett, CBS 11 News

WAXAHACHIE (CBSDFW.COM) – Police in Waxahachie are stumped over who may have been taking pot shots at passing motorists. At least four different vehicles were hit during a Monday night shooting spree. Some of the victims stopped by the Waxahachie Police Department on Tuesday afternoon to let investigators assess the damage. But nobody seems to know who is targeting them, or why.

In one case, the damage shows that the bullet just missed the driver’s door. In fact, in all four cases that are being investigated by police, the gunman appeared to have opened fire on the driver’s side of vehicles. All of the cars were heading north along Highway 77 between 6:00 p.m. and 7:00 p.m. Monday night.

The shootings happened along a short stretch of highway on the far south side of Waxahachie. Alan Chiles heard gunfire, but did not see anything. “There were three in a row, pause, then a fourth,” Chiles said, then imitating the sound. “Pow, pow, pow… pow.”

“Couldn’t believe it,” Chiles added. “Nothing like that happens here.”

A police photograph of another vehicle shows just how close a bullet came to striking a driver. Somehow, only one person was slightly injured. “We did have one backseat passenger, a 13-year-old female, struck in the foot,” said Chief Chuck Edge with the Waxahachie Police Department.

Edge would not elaborate on the exact caliber of the weapon, but did say that it was in the .40 to .45 range. Casings that match the caliber of the bullets were also found. They are being sent to a laboratory to see if they match. “It appears the subject may have been in a culvert, and was just shooting at cars as they came by,” Edge said.

Police are stumped at the motive for these seemingly random shootings. The four victims do not appear to be related in any way, other than being on the same road at the same time. That fact has not been lost on drivers who frequently travel this stretch of highway. “It is weird that it could just happen to anybody,” said motorist Alex Rivery.

Anyone with any information about this case is urged to contact the Waxahachie Police Department.