A heavily pregnant woman was killed by a crocodile while cooking lunch at her flooded home in Indonesia.

Munirah, 28, was standing in the swamped kitchen when the animal sank its fangs into her leg in North Kalimantan on Tuesday.

The mother-to-be, who was only identified by her first name, screamed as the beast then tried to thrash her in a death roll.

Hearing her pained cries, Munirah's sister Ana Maria rushed over and found her sibling holding onto a tree branch.

She rushed out of the room to find a weapon with which to beat the huge animal, but it had already dragged Munirah into the water by the time she returned.