UVALDE, Texas — Democratic Texas gubernatorial candidate Beto O’Rourke interrupted a news conference concerning the mass school shooting in Uvalde, Texas, Wednesday afternoon, shouting at Gov. Greg Abbott that the tragedy was predictable.

“This is on you,” O’Rourke said to Abbott. “This was totally predictable.”

In return, someone on the stage called O’Rourke a “sick son of a bitch ” and accused him of making the shooting a “political issue.”

A few moments later, O’Rourke was escorted out of the conference.

Prior to the confrontation, Abbott spoke about the need for mental health resources and provided new information about the shooting suspect. He was 18 years old, was a possible high school dropout and had no criminal history, Abbott said.

The suspect posted on social media several times prior to the shooting, stating on Facebook that he would target an elementary school.

As of Wednesday, 19 students and two teachers are confirmed dead.

O’Rourke has been critical of Republicans in the wake of the shooting and on Wednesday held an impromptu news conference of his own outside the elementary.

“These massacres aren’t natural disasters, acts of God, or random. They are totally predictable, direct consequences of the choices made by Greg Abbott and the majority of those in the legislature,” O’Rourke tweeted Tuesday.

In addition to Abbott, Wednesday’s news conference included Republicans Sen. Ted Cruz, Sen. John Cornyn, Texas Lt. Gov. Dan Patrick and Texas House Speaker Dade Phelan.