UPDATE: Pipe Bomb Caused Inglewood Drive Explosion

Update, 5:30 p.m.: Police released an image of a necklace they found at the scene of the explosion that may be related to the incident (see photos).

Anyone with information pertaining to this incident is urged to call the Montgomery County Fire and Explosives Tip Line at 240-777-2263. Callers can remain anonymous and the tip line is available 24 hours a day.

Update, 3:40 p.m.: Assistant Fire Chief Scott Graham said that a pipe bomb caused an explosion at 9214 Inglewood Dr. on Wednesday night. The pipe bomb was placed on the window sill of the house and detonated, he added.

The bomb will now go to a lab where the investigation will continue, Graham said.

Update, 12:45 p.m.: Montgomery County Fire and Rescue released that no one was home at the time of the blast and initial damage is estimated at $25,000.

The residence at 9214 Inglewood Dr. involved in the explosion is a 7,560 square-foot house on two acres of land in Potomac. As of January 2011, the property had a base value of $4,052,320, according to the Maryland Department of Assessments and Taxation.

The occupants of the house are two Iranians with permanent resident status in the United States, according to court documents.

Update, 9:15 a.m.: Montgomery County Police and Montgomery County Fire and Rescue are investigating an explosion that happened on Inglewood Drive in Potomac on Wednesday evening.

Police found some sort of explosive device on the front of a residence at 9214 Inglewood Dr. with help from neighbors, who reported hearing an explosion around 9:15 p.m. on Wednesday, said Assistant Fire Chief Scott Graham.

When Fire and Rescue and the county’s Hazardous Materials Crew responded, they found that the residence had an unusual odor and that one window had been blown out. Fire and Explosive Investigators as well as bomb technicians later responded to the scene, Graham said.

Investigators found an explosive device that had been placed in the front of the home and detonated, which caused the window to be blown out and minor damage to the interior of the nearest room, Graham said. The exact type of device used to create the explosion is unknown at this time, he added.

Montgomery County Fire and Rescue and their Fire and Explosive section will continue to investigate the incident, Graham said.