Authorities in Pennsylvania swarmed two homes as part of an investigation into a series of mysterious explosions since April.
Authorities descended on two houses in a suburb of Philadelphia on Thursday as part of the investigation into a series of mysterious blasts in the upper Bucks County since April.
Pennsylvania State Police told Fox News in a statement an “active research is ongoing in the area of Brick Tavern Road in Milford Township, located about 45 km northeast of Philadelphia.
FBI agents, in addition to the state and local police, can be seen searching two properties in the neighborhood. While the state police still will not say if anyone had been taken into custody, FOX 29 reported at least one arrest was made.
“The scene is safe and there is no danger for those who are involved in research and the surrounding community,” the police told Fox News.
Authorities say an “active investigation” was underway in the area of Brick Tavern Road in Milford Township, Pennsylvania.
Bucks County District Attorney Matt Weintraub is expected to provide more information about the research at a press conference at 3:30 pm ET, police said. The Bucks County District Attorney’s Office said WFMZ-TV the police activity is related to the explosion investigation.
The police investigated the reports of about three dozen explosions in the Upper Bucks County since April, with generally between 1 and 4:30 pm
The most recent explosion took place during the day on June 14, not far from home investigators raided on Thursday. A municipal employee is the cutting of the grass along Brick Tavern Road when the mower traveled more than an object that is “produced a sound similar to an explosion.”
A worker mowing along a roadway in Bucks County, Pa. heard an explosion and discovered the ground had been disturbed, Pennsylvania State Police said.
(Pennsylvania State Police)
PENNSYLVANIA POLICE URGE ‘BE VIGILANT’ AFTER A MYSTERIOUS EXPLOSION
The man was not injured, but the blast left a crater about 2 metres deep and 2 metres wide.
“There were no injuries to the township employee and no visible damage to the trigger,” police said at the time. State Police released photos of the location of the incident, and that turned out to be a reaper and a hole in the ground next to the mower stopped.
Mysterious night booms baffle Pennsylvania residents
Bucks County residents are woken in the night to the sound that they describe as a loud explosion; the police ask for assistance in identifying the window rattling, wall-shaking sounds.
The police has previously said that no one was injured since the explosions started, but the events “interfere with emergency response personnel from their normal exercise of his duty, straining local resources and hindering emergency workers from responding to other calls for service.”
MYSTERIOUS EXPLOSIONS PLAGUE PENNSYLVANIA CITIES, ‘STRAINING’ EMERGENCY SERVICES, POLICE SAY
Residents in the area have reported booms loud enough to rattle windows and walls to shake them awake.
“It is just like a tree. That is just how it sounds,” Donna Weaver told FOX29 at the end of April.
Weaver, a resident of Quakertown, said she heard the boom several times in the course of the month, she was waking up in the middle of the night.
“I don’t know and it’s a little scary,” she told FOX29. “Because I thought of it thinking, maybe it is underground, maybe underground somewhere.”
The Associated Press contributed to this report.
Travis Fedschun is a reporter for FoxNews.com. Follow him on Twitter @travfed