The UK government and arms firms based in Scotland were condemned in a Human Rights Watch report for selling weapons to an Egyptian regime that tortures children by waterboarding and electrocution.
Since the Yemen war began in 2015, war crime allegations have been linked to bombs made by US arms firm Raytheon, which has a factory in Fife.
Leonardo is targeting school leavers to work on Typhoon jets which have been used by the Saudis in Yemen's conflict.
Executives of a US arms firm which makes smart bombs in Fife could face investigation for potentially aiding and abetting alleged war crimes in Yemen by a military coalition led by Saudi Arabia.
Arms firms in Scotland are failing to make human rights checks which could prevent their products from being used in potential war crimes.
Arms firms due to attend a trade event dubbed a “festival of violence” gave MP's more than £60,000 in donations.
Serco, a firm evicting hundreds of asylum seekers from their homes in Glasgow, will be exhibiting at a controversial arms trade show.
Bombs and missiles will still be exported to Saudi Arabia under a secretive licensing system despite a court ruling that UK arms sales are illegal.
American multinationals Raytheon and Lockheed Martin are bidding for a lucrative Ministry of Defence training contract at Faslane.