Movies
© Rex Features
According to Variety, Relativity Media is eyeing the film as the start of a potential franchise.
Tunnels is based on Roderick Gordon and Brian Williams's children's book of the same name.
The plot centeres on a teenage boy who travels to a subterranean world ruled by an evil race called the Styx.
Two sequels to the book are to be published in the US this spring.
Splice opens in US cinemas on February 24.
More: Vincenzo Natali, Movies
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