The authorities have found 21 bodies on a farm showing signs of torture At least 21 migrant bodies have been discovered in a mass grave on a farm near Ajdabiya in eastern Libya, local media reported on Thursday.  Security forces raided the property after receiving a report that migrants from sub-Saharan Africa were being held there, the sources said. The mass grave was found about ten kilometers southeast of Ajdabiya, roughly 160km from Benghazi.  The Internal Security Agency in eastern Libya