Updated

Romania's foreign ministry says armed men have abducted a Romanian engineer in southern Nigeria, in what appears to be the latest hostage-for-ransom incident.

The ministry on Tuesday said the men attacked a group of foreigners Monday evening at a railway construction site in Agbor and snatched the man.

The ministry says Romania's embassy has asked Nigerian authorities to locate and rescue the man, whose family has been informed. Foreign Minister Lazar Comanescu has activated a crisis cell to handle the situation.

Kidnappings of Nigerians and foreigners are common all over the country. In the oil-rich southern Niger Delta, they are carried out by ordinary criminals as well as militants demanding a greater share of oil riches for locals.

Hostages are usually released unharmed after ransom payments.