Baltimore County police and fire crews responded Monday to a report of potentially hazardous materials in a rowhouse in the Parkville-Hillendale area.
Officer Shawn Vinson, a spokesman for the police department, said that shortly after 5 p.m. officers began investigating a 911 report of a strong odor coming from the basement of a residence in the 8300 block of Ridgely Oak Road.
The incident was largely concluded by 8:30 p.m., with no one injured and no property damaged, according to Vinson and Capt. C. Ross Cooke, a fire department spokesman.
Vinson said the investigation was triggered by a 911 call from the property's owner, who does not live on the premises but is a relative of the occupant.
Vinson said the owner came to the house on Monday, let himself in and called 911 after he smelled a "strong odor" inside.
Emergency crews located a chemical in the basement that was determined to be the source of the odor, Vinson said. He declined to identify the chemical, but he said it was determined not to be something that could be used to make a bomb or crystal methamphetamine.
Vinson said crews worked with the owner to open windows and ventilate the house. He said that the home's resident was not present when crews arrived and that officers sought to interview him. As of 10 p.m. Monday, no one had been charged with any crime in connection with the incident, Vinson said.
Residents who live on either side of the house were evacuated as a precaution but were allowed to return to their homes within several hours, Vinson said. The house has not previously been the subject of any investigation, he added.
The community is known as Loch Raven Heights, according to a resident of the block reached by telephone Monday night.