Explosions have destroyed or damaged 50 cash machines in and near Philadelphia since the weekend, and one man has died, in a coordinated effort to steal them or blow them up and take the money inside, authorities said.

The federal Bureau of Alcohol, Tobacco, Firearms and Explosives is leading the investigation, and no arrests have been announced. A 24-year-old man died hours after trying to break into an ATM early Tuesday, and explosives were recovered, police said.

But the ATM hits have continued, with explosions echoing overnight into Wednesday in the city or just outside it. Police are asking businesses that host the machines to take the cash out to discourage further hits.

A damaged ATM machine outside a KeyBank branch in downtown Pittsburgh on Sunday, May 31, 2020. Along with the damaged ATM, windows were broken during a march in Pittsburgh, Saturday to protest the death of George Floyd, who died after being restrained by Minneapolis police officers on Memorial Day, May 25. (AP PhotoGene J. Puskar)

A damaged ATM machine outside a KeyBank branch in downtown Pittsburgh on Sunday, May 31, 2020. Along with the damaged ATM, windows were broken during a march in Pittsburgh, Saturday to protest the death of George Floyd, who died after being restrained by Minneapolis police officers on Memorial Day, May 25. (AP PhotoGene J. Puskar)

“It’s not worth it,” Police Commissioner Danielle Outlaw said Wednesday. "It’s not worth the injuries that we’re seeing associated with this, and it’s not worth the risk to the community and the danger that it’s been imposing.”

Outlaw leads a department that this week used tear gas and rubber bullets to disperse crowds protesting the death in Minneapolis of George Floyd, a black man who died in handcuffs while a police officer pressed a knee on his neck.

Outlaw made her comments Wednesday while taking follow-up questions at a news briefing about the unrest, noting a “marked increase in attempts to forcibly enter ATM machines.”

People loot a Wells Fargo ATM, Friday, May 29, 2020, in Minneapolis. Protests continued following the death of George Floyd, who died after being restrained by Minneapolis police officers on Memorial Day. (AP PhotoJohn Minchillo)

People loot a Wells Fargo ATM, Friday, May 29, 2020, in Minneapolis. Protests continued following the death of George Floyd, who died after being restrained by Minneapolis police officers on Memorial Day. (AP PhotoJohn Minchillo)

She and other officials have not hinted whether they believe the ATM hits might be a crime of opportunity during the unrest, could have some other connection or are altogether unrelated.

Cash machines in some other cities, including Pittsburgh and Minneapolis, have been looted or damaged in recent days, but Philadelphia’s problem appears to be on a larger scale.

Thieves have blown up the machines, usually at convenience stores and gas stations, in at least 50 cases to get to the cash, while sometimes the entire machines are stolen, officials said.

Around 5 a.m. Wednesday, the ATM hits spread outside the city for the first time to neighboring Upper Darby Township when an explosion was reported at a machine outside a strip-mall nail salon.