Three days after a natural gas explosion in Baltimore killed at least two persons and injured seven, investigations to find the cause continued.
Initially, a natural gas leak had been the suspected source of the Aug. 10 explosion in a northwest Baltimore residential neighborhood. But Baltimore Gas & Electric, the city's main gas utility, said in an Aug. 13 update that its inspections determined none of its equipment, including gas mains, service pipes, meters and electric equipment, caused the explosion.