Last Wednesday and Thursday overnight, three Dallas police cars were shot up while parked in a school maintenance lot.
There were other vehicles in the parking lot at the time, but the squad cars were the only ones targeted.
Dallas ISD police are canvassing a Northeast Dallas neighborhood for witnesses to the shootings.
"And these shots, by my experience would tell me, they were fired from pretty close range," said Dallas ISD Police Chief Craig Miller. "We believe that where these vehicles were stored, it was definitely an assault on police."
The squad cars were shot up right before the Dallas Police Department headquarters was shot.
"Right, ironically that incident happened Friday night for Saturday," said Miller. "This happened actually Wednesday for Thursday and then Thursday for Friday."
"You don't think they're related?" said FOX 4's Shaun Rabb.
"No, absolutely I don't have any reason to think they're related, but I do think it's concerning in our time," said Miller. "It is concerning for people who put their lives on the line every day to make a safe environment, for them to have some jitters about being at work and maybe thinking that possibly they could be a target…I know that situations like what happened to us and what happened at Dallas at DPD over the weekend make us all hyper-vigilant and maybe not necessarily on edge, but make us make our senses really heightened because we know that at any time any of us could be a target."