More than four dozen containers were lost overboard from the P&O Nedlloyd Mondriaanin the Bay of Biscay late last week just days after a similar incident off the Dutch coast, reports Lloyd’s List.

The 8,500 teu containership, on charter to Maersk Line, was heading back to Asia. Reederei Blue Star, which manages the ship on behalf of German KG investors, is investigating and expects to have a clearer idea of the cause in the next few days.

Weather conditions were said to be bad, with reports that containers from several other ships in the area had also been washed overboard.However, initial reports also suggested faulty twistlocks might be to blame.