SCURRY, Texas -- A shotgun-wielding man threatened a rural East Texas high school Friday morning until students and a teacher wrestled him to the ground, authorities said.

The 18-year-old man, a former student at Scurry-Rosser High School, went into the school office and ordered students into the cafeteria, said principal Richard Sneed.

The man allegedly began pouring gasoline on the floor. Students then helped subdue him, authorities said.

"He did not say a word, didn't really look at anybody," said Courtney Robertson, a junior at the high school. "Everybody was crying, it was horrible. We thought we were all going to die."

Robertson said the principal and a teacher slowly walked up to the man and grabbed the gun, then wrestled him to the floor.

No injuries or gunfire were reported, but classes were canceled for the rest of the day.