Thee-legged Bug/Assasin Bug

Saw this at Colo-i-Suva, Fiji.
Small in size, around 1 cm in length but very thin.
When I first saw it, had thought it was a Spider but close-up shots of the head makes me think this could be an Assasin Bug.
It has very thin elongated thorax and the front legs were posing like Praying Mantis.
It is capable of flight as it flew away after I took several pictures of it.