Four human skulls found in Mexico package bound for US

Four human skulls were discovered inside a package at a Mexican airport that was due to be sent by courier to the United States, local authorities say.

The skulls were found wrapped in aluminium foil inside a cardboard box at Queretaro intercontinental airport in central Mexico, the national guard said on Friday.

The national guard gave no further details on the age, identity or possible motive for the sending of the human remains.

The transfer of human remains requires a special permit from a competent health authority, which was not obtained, it said.