Dimitrios Pagourtzis, the Texas teen believed to have killed at least 10 people Friday when he opened fire at Santa Fe High School, was able to sneak weapons into the school by hiding them under a trench coat.

From USA Today, Texas Governor Greg Abbott said Friday afternoon that Pagourtzis, 17, used his father’s shotgun and .38 revolver in the attack. While the guns were legally obtained, it’s unclear whether the teen’s father knew his son was in possession of the firearms.

Officials told the newspaper that Pagourtzis apparently concealed the weapons under a long coat despite temperatures being at around 90 degrees.

Abbott claimed that Pagourtzis had laid out his plans in journals and on a computer. While Pagourtzis had initially planned to commit suicide at the conclusion of the carnage, Abbott said he surrendered to police and “admitted that he didn’t have the courage to commit the suicide.”

Santa Fe Independent School District (SFISD) Police Chief Walter Braun confirmed that explosives were discovered on campus and in the surrounding area. Law enforcement sources went on to tell KHOU that several agencies are searching a mobile home where Pagourtzis is believed to have lived.

Explosives involved in Friday’s incident included a CO2 device and a Molotov cocktail, Abbott said.

READ More: Santa Fe school shooting suspect identified as Dimitrios Pagourtzis: Reports

KPRC reported that a Galveston County prosecutor confirmed that Pagourtzis has been charged with capital murder and aggravated assault of a peace officer.

While initial reports indicated that one person of interest beyond the suspect was being questioned, Abbott said police are speaking to two people of interest in regards to Friday’s incident.

This is a developing story. Be sure to check back with CrimeOnline for updates as they become available.

[Featured image: Dimitrios Pagourtzis/Facebook]