The attorney general of Pennsylvania is investigating possible criminal charges over the derailment of a Norfolk Southern train in East Palestine, just across the border in Ohio. Governor Josh Shapiro said environmental officials are continuing to monitor for any contamination in Pennsylvania. Shapiro spoke Tuesday at a press conference with Ohio Governor Mike DeWine and EPA head Michael Regan.

Gov. Josh Shapiro: “We will hold accountable Norfolk Southern, the company that made this vigilance necessary. The combination of Norfolk Southern’s corporate greed, incompetence and lack of care for our residents is absolutely unacceptable to me.”

Transportation Secretary Pete Buttigieg is visiting East Palestine today after coming under enormous pressure for his initial response to the disaster. Critics say he should have visited the site of the crash immediately, and rejected his claims that he was powerless to improve rail regulations.

On Wednesday, former President Trump visited East Palestine and blasted Biden’s response to the crash, as well as his absence, saying he was busy “touring Ukraine.” In 2018, the Trump administration rescinded an Obama-era rule that would have required more sophisticated brakes on trains carrying hazardous materials. Trump’s EPA also rolled back many environmental regulations.