A white powder in the mail prompted emergency teams to respond Saturday night to a Sangaree house in Berkeley County.
Hazardous material experts and law enforcement were at the home at about 10:30 p.m., officials said.
A resident of the home on an unidentified street told officials that at about 5:30 p.m. he was collecting the mail when the powder fell from a magazine. He was in the car with his wife and daughter, said Tom Smith, Berkeley County emergency preparedness director.
Emergency workers were donning protective suits in preparation for retrieving a sample of the unknown substance from the car, which was sitting in the driveway, Smith said.
Hazardous materials teams from Charleston and Summerville, the State Law Enforcement Division, the Charleston County Bomb Squad and the Berkeley County Sheriff’s Office were on the scene, he said.
The state Department of Health and Environmental Control had been notified, he said.
Smith said he would not reveal the street where the operation was happening.