Gunmen on Monday kidnapped a foreign national who was working as regional head of the UN Refugee Agency in Pakistan's insurgency-hit southwest province of Baluchistan, police said.
The incident took place in Quetta, the provincial capital.
"The UNHCR regional chief was on his way to (his) office when ambushed by unknown gunmen," local Pakistani police official Khalid Masood told AFP.
"They opened fire. His driver was wounded and died on the way to hospital," Masood said.
"The gunmen took him (the UN official) away to an unknown location," the police official added.
An aid worker, speaking on condition of anonymity, also told AFP that an expatriate official from the UNHCR was kidnapped on Monday in Quetta.
But a spokeswoman for the UNHCR in Islamabad said: "We are not able to confirm anything".