An Afghan senator was kidnapped by unknown gunmen early on Sunday about 70 kilometres from the capital, Kabul, officials said.
It was not clear who had captured Abdul Wali, a member of the Upper House of parliament from the province of Logar adjoining Kabul, they said.
"He was accompanied by two armed guards. His guards were disarmed and he kidnapped alone," interior ministry spokesman Zemarai Bashary told reporters.
Police in Logar said Wali's driver had also been kidnapped but his two bodyguards were not.
"The investigation has started and until now we have had no information about him," Logar police chief General Mustafa Mohseni told AFP.
Afghan parliamentarians have frequently been targeted in the rising violence in Afghanistan, much of it linked to an insurgency led by the hardline Taliban movement that was in government between 1996 and 2001.
A member of the lower house of parliament was shot dead by unknown gunmen in the southern province of Kandahar on July five.
The parliamentarian, Habibullah Jan, was the 10th MP to be killed since Afghanistan's first democratically chosen parliament was elected in 2005.