BRUSSELS (AP) — There’s one big reason the United States has a dearth of execution drugs so acute that some states are considering solutions such as firing squads and gas chambers: Europe won’t allow the drugs to be exported because of its fierce hostility to capital punishment.

The phenomenon started nine years ago when the EU banned the export of products used for execution, citing its goal to be the “leading institutional actor and largest donor to the fight against the death penalty.” But beefed up European rules mean the results are being most strongly felt in the United States now, with shortages becoming chronic and controversial executions making headlines.