ONITSHA, Nigeria (REUTERS) - A Romanian engineer who was kidnapped in Nigeria's oil-producing Niger Delta region earlier this week has been rescued, police said on Friday (Oct 14).

The man, who was working for construction firm Dextron Nigeria Ltd, was abducted by gunmen in the Owa Oyibo area late on Monday (Oct 10).

Celestina Kalu, a spokeswoman for police in Delta state, said the Romanian man was rescued along with a colleague whose nationality she did not disclose.

"They were rescued two days ago along the Urhonigbe-Abraka road in the bush. No ransom was paid, no arrest has been made,"she said.

Kidnappings are common in the impoverished region, which has been hit by militant attacks on oil and gas facilities and a general breakdown of law since the start of the year.

Militants say they are fighting for a greater share of oil revenues for the southern swampland region, home to most of Nigeria's oil production.