Does anyone know the name of this B&W old SciFi movie. We watched it as kids in the 70's on Creature Double Feature (new England area). It starts in a lab somewhere where the tech discovers something horrible that kills him. Then we're on an Island (British maybe) where these creatures (sort of tortoise like things with long necks that kill people) run wild. Eventually everyone in town is locked inside a school gym and the creaturs are outside eating cows inoculated with something the scientists hope will kill the creatures. And just in time before breaking into the gym they all die but somewhere else another scientist creates another creature. Any thoughts?

Ah Never mind. Island of Terror 1966 and it looks like I can still buy it but sadly not in time for christmas this year for my brother.