Story highlights Suspected gunman had worked at the same company as the victims

He was recently dismissed "due to drug related issues," embassy says

The shooting happened in Saudi Arabia's capital, Riyadh

No information on a motive has been immediately released

(CNN) One American defense contract worker was killed and another was lightly injured in a shooting at a gas station in Saudi Arabia's capital on Tuesday, a U.S. State Department official said.

The two were at a gas station in Riyadh when a gunman opened fire on their car, the country's official news agency reported, citing police in the city.

The Saudi Embassy in the United States identified the suspected gunman as Abdulaziz Fahad Abdulaziz Alrashid, 24, a dual Saudi-American citizen who had worked at the same U.S. defense contractor as the victims.

He was recently dismissed from the job "due to drug related issues," the Embassy said.

Alrashid was reportedly taken into custody following a shootout with security forces, which left him injured.

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