A Lubbock man here on a student visa turns out to be planning a terrorist attack using explosive chemicals.

A college student from Saudi Arabia studying chemical engineering in Texas has been arrested by the FBI for allegedly planning a terrorist attack on U.S. targets using explosive chemicals.

Khalid Aldawsari, who is legally in the U.S. on a student visa, allegedly targeted the Dallas home of former President George W. Bush. He was arrested late Tuesday on a federal charge of attempted use of a weapon of mass destruction.

“Yesterday’s arrest demonstrates the need for and the importance of vigilance and the willingness of private individuals and companies to ask questions and contact the authorities when confronted with suspicious activities,” said James T. Jacks, U.S. Attorney for the Northern District of Texas.

Aldawsari, 20, entered the U.S. in October 2008 from Riyadh, Saudi Arabia, to study at Texas Tech University, then transferred earlier this year to nearby South Plains College.

Federal prosecutors say Aldawsari had been researching online how to construct an improvised explosive device using several chemicals as ingredients. Authorities say Aldawsari's diary indicated the young man had been plotting an attack for years and obtained a scholarship so he could come directly to the United State to carry out jihad.