Worldwide media reports cite a military spokesman saying a Canadian and a Scottish oil worker were kidnapped off a rig in the Niger Delta on Saturday.
The victims, who were seized by the gunmen at a rig in Ogbele, are employees of Niger Delta Petroleum Resources (NDPR), an indigenous and independent operator of small to medium-sized oil fields.
The kidnapped expatriates are a Scot and a Canadian. Ibrahim Abubakar said in a statement to the Daily Mail.
Troops were searching surrounding swamps, he added.
Security forces are hunting for the kidnappers, he said. It has been plagued by criminal gangs and by armed groups demanding a greater share of oil revenues for the region.
On Thursday two Shell workers were taken and their police escorts were killed.
When contacted, Rivers police Spokesman, Nnamdi Omoni, a Deputy Superintendent of Police (DSP), said: "I have sketchy report".
Authorities said this is the second kidnapping in Rivers State in less than a week.