Jarratt, Va. ? A Pakistani man who killed two CIA employees in a 1993 shooting rampage outside the agency’s headquarters was executed Thursday as the State Department warned of global retaliation against Americans.

Aimal Khan Kasi, 38, died by injection at the Greensville Correctional Center at 8:07 p.m. CST.

“There is no god but Allah,” Kasi said, softly chanting in his native tongue until he lost consciousness.

Hours before the execution, the U.S. Supreme Court rejected an appeal and Gov. Mark Warner denied a request for clemency, saying Kasi had “shown absolutely no remorse for his actions.”

Last week, the State Department warned that Kasi’s execution could lead to acts of vengeance against Americans. Two days after his conviction, assailants shot and killed four U.S. oil company workers in Karachi, Pakistan.

Early today a bus exploded in the Pakistani city of Hyderabad, killing at least two people and injuring five, police said.

The explosion came only hours after Kasi’s execution, but there was no evidence the two events were related.

Some Pakistani politicians pleaded with U.S. officials to spare Kasi’s life, saying commutation could “win the hearts of millions” and help the United States in its war on terrorism. Hundreds of students protested this week in Pakistan, warning Americans there they will not be safe if Kasi dies.

Kasi killed CIA communications worker Frank Darling, 28, and CIA analyst and physician Lansing Bennett, 66, as they sat in their cars at a stoplight in McLean.