Venezuelan search and rescue teams head out for a sixth day running, looking for a missing aircraft carrying Italian fashion executive Vittorio Missoni.

The small twin engine plane, also carrying Missoni's wife and five others, disappeared on Friday after taking off from an archipelago off the coast of Venezuela.

Search and rescue teams flew the presumed route of the missing plane on Wednesday, and sent divers deep into the Caribbean Sea as the search intensified.

Venezuelan officials have discounted the weather as a factor in the disappearance, saying the weather was clear when the plane took off.

Italian media reports have suggested that the group may have been kidnapped.

Vittorio is the marketing director and oldest son of the founders of fashion house Missoni.