UPDATE, 9 p.m.
The Dorchester County Sheriff's Office says a hostage situation at a Pilot truck stop off Interstate 95 outside Harleyville has ended.
A three-year-old child was removed unharmed from the vehicle. A male suspect has been transported by Dorchester County EMS to an area hospital with a self-inflected gunshot wound to the head, according to the Sheriff's Office.
The case remains under investigation.
UPDATE, 5:20 p.m.
Chief Deputy Sam Richardson with the Dorchester County Sheriff's Office says a man has a hostage in a vehicle at a truck stop outside the town of Harleyville.
According to Richardson, deputies and crisis negotiators are in the process of working with the suspect to deescalate the situation.
Richard says the suspect may be armed.
Witnesses tell ABC News 4 a man and woman got into an argument inside the Pilot truck stop off Exit 82 on Interstate 95 in Dorchester County on Sunday afternoon, prompting the man to take a child hostage inside a vehicle. Witnesses say the man fired a gun inside the vehicle.
ABC News 4 is working to gather information about a hostage situation involving a child at a truck stop and gas station off Interstate 95 in Dorchester County.
Witnesses say law enforcement has blocked off entrances and exits to the property of the Pilot truck stop at Exit 82 right off I-95, after a person took a child hostage and fired a gun from inside a vehicle through the windshield.
According to witnesses, a couple went into the convenience store with a child and began arguing, prompting a man to take the child and run out of the store.
From there, the man got into a car, then fired a gun, witnesses say.
The convenience store has been placed on lockdown while law enforcement investigates, according to witnesses.
This is a developing story and will be updated.