Paris, France (CNN) -- Three French nationals were kidnapped overnight in an attack on their oil-services ship off the coast of Nigeria, the company they work for said Wednesday.
There has been no claim of responsibility for the attack on the Bourbon Alexandre by several speedboats, said Bourbon, the oil services company, in a written statement.
The French Foreign Ministry is "mobilizing in Paris and Abuja, (Nigeria,) to secure their release. We are in close contact with the Nigerian authorities, the Bourbon group and the victims' families," it said.
Sixteen crew members were on board at the time. Thirteen remained on the ship and were unhurt, the company said.
The company's crisis unit in Marseilles, France, is "evaluating the situation in real time and working to obtain a rapid liberation in the safest security conditions," it said.
Bourbon declined to provide any more information in response to CNN questions.
The company provides ships and underwater services to oil and gas clients worldwide, it says on its website.
CNN's Saskya Vandoorne in Paris, France, contributed to this report.