An Indian court has acquitted two suspects in the death of a British teenager whose body was found on a popular beach in western India in 2008.

Fiona MacKeown, the mother of 15-year-old Scarlett Keeling, said she was shocked by Friday's verdict and would challenge it in an appeals court. Keeling's bruised and partially clothed body was discovered on a Goa beach.

Police initially said Keeling drowned because she was drunk, but pressure from her family forced a second autopsy that indicated she was likely killed and may also have been raped.

Two men who were allegedly seen drinking at a bar with Keeling the night she died were arrested and tried on charges of culpable homicide and sexual assault.

Keeling's family comes from Bideford in southwest England.