MOMBASA, Kenya (AP) — Kenyan security forces searching a Norwegian ship at Mombasa port have discovered undeclared weapons among the consignment of U.N. vehicles.

The vessel's owner, Hoegh Autoliners, said in a statement Wednesday that Kenyan authorities searching the cargo found weapons inside some of the U.N. vehicles that had not been declared in the cargo manifest.

The shipping company said it believes the weapons belong to the U.N. vehicles in which they were found. The company said its shipping contract clearly stated that no weapons should be transported. The consignment of vehicles was from Mumbai, India, and was destined for the U.N. peacekeeping mission in Congo.

Kenyan police spokesman Charles Owino said Wednesday an investigation is ongoing and a report will explain why police targeted the ship, the Hoegh Transporter.