Police are searching for a person who detonated three homemade explosive devices in a residential area of Hanover, and apparently left behind several more undetonated explosives.
No one was injured in the explosions and no property damage has been reported, said Hanover Police Chief Walter Sweeney. At this point, it does not appear that there was a target for the explosives or any intent to cause harm, he said.
“Essentially, these appear to be homemade devices and not firecrackers,” Sweeney said. “It appears there is someone experimenting with making these devices.”
The explosions were first reported at 8:34 p.m. March 12 in the area of Pine Street and Tower Hill Drive, according to a statement from the Hanover Fire Department. Witnesses in the area reported a bright flash and two loud explosions, the statement said.
After searching the scene, the State Police Bomb Squad recovered several unexploded devices, which they later detonated in a secure location, the statement said.
The devices were classified as M-1000 explosives, said Jennifer Mieth, a spokeswoman for the State Fire Marshall’s office.
M-1000s contain flash powder, a highly volatile explosive made from various chemicals, said Jeff Groh, assistant special agent in charge of the Bureau of Alcohol Tobacco, Firearm’s Boston field office.
“In general, [M-1000s are] just made to make a lot of noise more so than anything else,” he said, adding that if such a device was held when detonated, it could blow off the person’s hand.
Three days after the March 12 explosions, witnesses in the nearby Hearthstone Way and Fieldstone Lane area reported another explosion at 7:49 p.m., but no unexploded devices were found in the area, the fire department statement said.
“Officials are concerned that continued incidents will lead to injury or property damage,” the statement said. “The potential is high for injury to innocent parties who find unexploded devices. The danger is increased by the fact that the recovered explosives appear to be non-commercial devices made by untrained parties.”