On May 25, local time, police in Richardson, Texas, arrested a high school student.
That morning, people called the police saying that the person was walking towards the school with a rifle-like object.
Police did not find any weapons at the scene when they arrested the man.
Police later found an AK47 pistol and an AK15 rifle in the man's car.
At present, the police have filed a lawsuit against him for illegally carrying a weapon.
The school has refused to disclose the age of the person involved, and nearby schools have entered a state of martial law.
(CCTV reporter Liu Xiaoqian)