An animal testing laboratory in Germany that subjected monkeys to “barbaric” treatment and kept unwell dogs in squalid conditions is under investigation amid calls for the closure of the centre by animal rights groups.

The calls come after footage, allegedly shot at the Laboratory of Pharmacology and Toxicology facility near Hamburg, shows a monkey strapped in a metal harness, and a bleeding dog left untreated in its cage.

Friedrich Mülln, head of Soko Animal Welfare, claims the LPT facility tests chemical substances on animals on behalf of pharmaceutical and chemical manufacturers.