A 16kg consignment of cocaine lost by Mexican drug traffickers has turned up at the United Nations in New York.

Two fake UN diplomatic pouches containing drugs - which experts said had a street value of more than US$2 million ($2.4 million) - were shipped from Mexico through the DHL shipping company's centre in Cincinnati, Ohio, but had no address on them, nor any return-to-sender details.

UN assistant secretary- general Gregory Starr told reporters there was no evidence that anyone from the United Nations was linked to the bags.