Savage Terror (1978)

(a.k.a. Primitives)

Three students, Tommy, Rita, and Robert, and their guides head into the jungle to study primitive tribes separated from civilisation. However, the students say the one tribe they visit isn't primitive enough, and they want to find some really savages, and to locate the legendary cannibal tribe supposedly living in the area.

Savage Terror was on the Section 3 Nasties List and was liable for seizure and forfeiture by the police. No UK re-release.