BURLINGTON, N.C. -- Burlington police are searching for two suspects who they say assaulted a woman during a home invasion early Thursday.
The victims, which included a 57-year-old man, a 28-year-old woman, and a 48-year-old woman, told police the suspects forced their way into their home at 1352 Snow Court shortly before 2 a.m.
One of the suspects was armed with two semi-automatic handguns -- one black and one silver, police said.
Police said the armed suspect threatened the man and attacked the 28-year-old while "continuously" demanding money inside the home.
The suspects then ran away in an unknown direction. Police said a single gunshot was fired in an unknown direction as the suspects fled.
It was not clear if any property was stolen, but no injuries were reported.
The first suspect, who was armed, is described as a black male between the ages of 17 and 23 standing 6' tall with a slender build. He was wearing a green toboggan that was pulled down over his face, a long-sleeve shirt, and blue jeans with black tennis shoes at the time.
The second suspect is described as a white male between the ages of 17 and 23 standing 5'10" tall with a slender build. No clothing description was available.
Burlington police said they've seen a recent increase in the number of home burglaries. The most recent marks the 13th of its nature the department has responded to in 2012, while police said they normally see about half the number of cases by this time of the year.
"We feel like we've got a group or maybe two groups of people committing these crimes," Capt. Steve Smith told FOX8's Nicole Ferguson.
No arrests have been made in eight of the other twelve cases, including one that happened in July when a 65-year-old woman was shot in the stomach during a burglary at her Ford Street home.
Days earlier, a 79-year-old woman was held at gunpoint, bound by telephone cord and robbed in her Rader Street home.
"There's no specific area or location that we can look at and say these areas are being targeted," Smith said.
Smith said the Burlington Police Department is working with the Alamance County sheriff's Gang Task Force unit and the Graham Police Department in an effort to solve the crimes.
Each of the departments have reported similar cases in their respective regions, however none have experienced the volume that Burlington police have.
Anyone with information about any of the incidents is asked to call police at (336) 229-3530 or Crimestoppers at 229-7100.