(CNN) -- Hostages from America, France, Canada and Indonesia comprise the group of seven people kidnapped by armed attackers who raided an oil rig off the Nigerian coast, a spokesman for the rig's owner said Tuesday.
London, England-based Afren PLC said two Indonesians, two Americans, two French and one Canadian were kidnapped. The Indonesians were not included in an earlier tally released by the company.
Two crew members are in stable condition at a shore-based clinic, where they were airlifted after being wounded in the leg.
The rig, located off the southern coast of Nigeria at Okoro field, is run by Transocean.
State Department spokesman P.J. Crowley said the U.S. is in contact with Nigerian officials.
"We [are], of course, concerned about their safety and hope for their immediate release," he said. "We are working with Nigerian authorities ... to pursue their prompt release, and there's an investigation already under way".
Drilling operations in the Okoro field off Nigeria have been temporarily suspended, both companies involved said.
In a news release, Afren said a "security breach" occurred soon after its "High Island VII jackup rig" arrived, but before drilling had commenced.
CNN
