BURTON, Mich. (WWJ) -- It was a coincidence that police took seriously.
Authorities say there is no connection between Sunday's Grand Blanc mass shooting and a bomb threat at a Burton Meijer store — despite the fact that the alleged gunman lived across the street.
The Burton Police Department says it has thoroughly investigated the incident that led to the evacuation of the local Meijer, on S Center Rd.
Shortly after 8:30 p.m. on Saturday, police responded to the store on a report of a bomb threat.
All shoppers and safe were safely evacuated, and Michigan State Bomb Team responded to the scene and searched the building with Burton Police officers.
Nothing was found, and the threat was deemed to be not credible.
No one was hurt.
Police said the culprits who called in the threat were identified as to juveniles from Delta Township who "were bored and decided to make prank calls."
The next day, however, police learned that Thomas Jacob Sanford of Burton — identified as the gunman in the Grand Blanc church mass shooting and fire — lived across the street from Meijer on Atherton Road.
That's when the investigation was reopened, but still no connection was found.
The Burton PD said Monday afternoon: "When the Burton Police Department was informed that the shooter also had explosive devises at the scene, we looked deeper into the Meijer incident. While we did not believe the two were related, we wanted to investigate any possible connection. After an exhaustive investigation, we have found no connection between the Meijer incident and the shooter from Grand Blanc Township."
Burton Police said the department will be seeking charges for the juveniles for making the bomb threat.
Meanwhile, the FBI is heading up the ongoing probe into the deadly mass shooting and fire in neighboring Grand Blanc.
Police said Sanford drove his Chevy pickup into the Church of Jesus Christ of Latter-day Saints during a crowded Sunday service, and started shooting, before setting the church on fire.
Four people are dead, eight others injured. Police say two people were shot and two others were found in the rubble of the church.
MORE: Reaction pours in from across the country following the mass shooting at Grand Blanc church