Contact has been made with three workers from an Aberdeen-based offshore company who have been kidnapped in Nigeria.
There has been a spate of kidnappings in the area
The men were working in the Delta state when they were taken hostage at gunpoint on Tuesday.
Sparrows said it was working with police, security advisers and the Foreign and Commonwealth Office (FCO).
The FCO said the Nigerian government had been in contact with the hostages and that they were alive.
One of the kidnapped workers has been named locally as engineer Paul Smith, from Peterhead.
The Sparrows employees were among several men abducted in the attack.
A company spokesman said: "Naturally we are concerned for the safety of our own colleagues and that of other companies' employees who have been affected.
"We are liaising with the Foreign Office, local police and our advisers in Nigeria.
"We are in constant contact with the families in the UK and will be keeping them informed of developments."
There has been a wave of kidnappings of oil workers by militants in the country seeking ransoms. Victims are often released a few days after being taken.
The FCO is advising against all but essential travel to the area.