From Compassion in World Farming "Appalling scenes of horrendous mass pig killing taking place in Egypt right now have sparked international protest. From media footage, we have seen hundreds of live pigs being thrown on top of each other in a huge dumper truck. Some must surely suffocate right away or break their limbs. They are then driven to a mass grave, thrown into it and covered in what appears to be quicklime, where they must endure a slow and agonising death."
 
Egyptian media reports that “When the lorry is filled with 400 pigs on average, it sets off for the burial ground in Abou Zabal. Once there, something like soft sand is sprinkled on the pigs inside the lorry. This material is made up of factory wastes. The pigs start to scream because of the searing pain until they die some 30 or 40 minutes later.”
 
http://www.ciwf.org.uk/news/factory_farming/egyptian_government_cruel_pig_slaughter.aspx