A young pregnant woman and her partner are missing after jumping into a crocodile-infested river in the Northern Territory while attempting to flee police.
Caitlyn Munnich, 19, Raphael Woodhouse, 25, along with three other people, evaded a random traffic stop in the Kakadu region, police told AAP.
They managed to evade police for a few hours before fleeing into Bird Billabong in the Mary River early on Saturday morning.
While the three unnamed accomplices are co-operating with police, officers hold fears the couple jumped into the dangerous river to escape.
"We believe the pair may have jumped into the Mary River and hold grave concerns for their welfare," Territory Duty Superintendent James O'Brien said.
"The Mary River system is full of salt water crocodiles and we are hoping that these people have made it to safety."
The couple excitedly announced on Facebook in July they are expecting a baby.
A spokeswoman for NT Police told AAP the search has been called off for the night.
Ms Munnich is described as being of indigenous appearance, about 160cm tall with long dark hair.
Ms Woodhouse is described as being of indigenous appearance, about 175cm tall and of medium build with short dark hair.