Nigerian gunmen have demanded a ransom of 1.2 million pounds for the release of three Britons and a Colombian abducted this week, the police said Friday.
"The kidnappers have asked for payment of 300 million naira before the men can be released," Rivers State police spokeswoman Rita Abbey told AFP.
She gave no further details.
The four -- contract workers for the Anglo-Dutch oil giant Shell -- were abducted on Tuesday between oil city of Port Harcourt and nearby Aba in Abia State.
The gunmen shot dead the foreigners' police escort and wounded their driver during the attack.
The incident was the first major kidnapping in southern Nigeria since last July, following a lull in the wake of a government amnesty which saw thousands of militants lay down their arms.
Source: AFP European Edition