An American and a Canadian were abducted in Nigeria's northwestern state of Kaduna after their police escorts were killed in a gun battle with attackers, police said Wednesday.
The foreigners were kidnapped on Kwoi-Jere road in Kagarko Local Government Area on their way to Abuja from Kafanchan and Kaura.
There has been an increased spate of kidnappings in Nigeria, where both Nigerians and foreigners have been targeted.
Aliyu said, "The two policemen attached to the vehicle were shot dead during an exchange of gunfire with the kidnappers who later took away the foreigners to an unknown destination".
A spokesman for the United States Embassy in Nigeria declined to comment.
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Those abducted were two Americans and two Canadians.
Though he did not give further details, he said the anti-kidnap unit of the police was on the trail of the kidnappers. In October four British were trapped in Delta State in the south, of which three were released after negotiations, but the fourth was killed.
The Abuja-Kaduna road has always been a haunt for kidnappers.
Two German archaeologists were abducted in the region in February past year.