SANTA FE, Texas -- Ten people were killed in a shooting Friday morning at a high school south of Houston, Texas Gov. Greg Abbott said. School district Police Chief Walter Braun said that explosive devices were found in Santa Fe High School and the surrounding area.

According to law enforcement sources, nine students and a teacher were killed in the shooting, CBS News senior investigative producer Pat Milton reports. At an afternoon press conference, Abbott said that another 10 people were wounded.

The suspect in custody was identified as Dimitrios Pagourtzis, 17, Galveston County Sheriff Henry Trochesset said in a statement. He was being held without bond on a charge of capital murder. Harris County Sheriff Ed Gonzalez said the suspect was believed to be a student at the school.

Abbott said that two people in interest were being interviewed by authorities. He didn't identify them.

The suspect had said that he wanted to commit suicide after the shooting, Abbott said.

"He gave himself up and admitted at the time that he didn't have the courage to commit the suicide," Abbott said.

Dimitrios Pagourtzis in photos from his social media accounts

Police found pressure cookers and pipe bombs around the school, a law enforcement source told CBS News.

There was an active search for explosives, a federal law enforcement source told CBS News justice and homeland security correspondent Jeff Pegues. Authorities were in the process of rendering them safe and asked the public to call 911 if they see anything suspicious.