A 4-year-old Indiana girl was fatally shot by her 5-year-old sibling while playing with a gun, authorities said Wednesday, the latest unintentional shooting by a child in the United States.

Police in Cumberland, Indiana, responding to reports of a shooting found the girl, Deor Nita, suffering from gunshot wounds upstairs in an apartment around 4:45 p.m., The Indianapolis Star, part of the USA TODAY Network, reported. Preliminary information suggests that her sibling may have fired the weapon when they were playing, according to Police Chief Suzanne Cooke-Woodland.

They were with two other siblings playing and were being supervised by their great-great-grandmother while their mother was at work, Woodland told The Star.

“It’s just awful,” Woodland said. “It makes no sense.”

It was unclear how or where the toddler got hold of the gun and who owns it, police said.

Guns are ‘not toys,’ Indiana police chief warns

Woodland, the police chief in Cumberland, Indiana, said Wednesday’s fatal shooting in her town is a tragic reminder of the importance of gun safety. She told reporters that guns are “not toys” and urged owners to “quit carrying them around” without safety devices or without some kind of way of storing them.

“People carry guns without safety devices and this is what happens. They have no respect for firearms and just the massive power they have and what they can do to people,” Woodland said, urging owners to get gun locks which are usually given away at police and fire stations.

“We have tons of them at our station. We will be happy to give them to you,” Woodland continued. “People should put their firearms away and not carelessly lay them around their houses.”

“This is a tragic situation and my heart goes out to them,” Woodland said.

Indiana shooting involving kids latest in disturbing nationwide trend

The shooting in Indiana is the latest in a recent string of incidents where kids are pulling the trigger nationwide.  

So far this year, there have been at least 186 unintentional shootings by children in the U.S. this year, resulting in 66 deaths and 128 injuries, according to Everytown Research & Policy. The organization tracks media reports involving kids under 18 unintentionally shooting themselves or someone else. Everytown’s current stats are on par with last year’s tallies.