Theropod and sauropod dinosaurs sighted in PNG?

Theropod and sauropod dinosaurs sighted in PNG?: "Since the 1990s, a large ‘reptilian’ creature has been sighted occasionally on Ambungi Island in West New Britain, Papua New Guinea. Ambungi Island is located on the south coast of West New Britain between Kandrian and Gasmata. The creature has also been sighted on Alage Island,2 about 1km to the south of Ambungi Island."