Authorities in Texas are confirming at least 9 people are dead after a shooting at Santa Fe High School early Friday morning. And explosive devices have now been found at the school and nearby.

The Associated Press is reporting 17-year-old Dimitrios Pagourtzis is the person in custody in connection to the shooting.

Police and local government officials are cautioning residents to be on the lookout for suspicious devices that could contain explosives.

An unknown number of people are in the hospital and are undergoing surgery.

Police say Pagourtzis was believed to be a student from the high school.

Friday morning around 7:30 in the morning, police responded to reports of a shooting at a high school in Santa Fe, Texas.

Santa Fe police told CBN News that officers were on the scene at Santa Fe High School but would not confirm any other details.

Based on the details available, this appears to be the worst school shooting since the Parkland, Florida massacre at Marjory Stoneman Douglas High School in February.

School district officials in Santa Fe, Texas confirmed the latest news about the shooting Friday afternoon on their Facebook page:

Santa Fe is located between Galveston and Houston.

The Harris County Sheriff's Office confirmed they were also sending deputies to the scene. And Life Flight was called to the school.

President Trump tweeted, "School shooting in Texas. Early reports not looking good. God bless all!"

School shooting in Texas. Early reports not looking good. God bless all! — Donald J. Trump (@realDonaldTrump) May 18, 2018

Moments later, President Trump spoke to the nation about the shooting at Santa Fe High School.

He said shootings like today's have "been going on too long in our country" and said his administration was "determined to do everything in our power to protect our students, secure our schools, and to keep weapons out of the hands of those who pose a threat to themselves, and to others."

He also said, "May God heal the injured and may God comfort the wounded and may God be with the victims and with the victims’ families. Very sad day."