NT croc shot in search for missing man

Northern Territory Police say it is still too soon to know if a two-metre crocodile killed Travis Costa, who has been missing for almost a week.

The 22-year-old Aboriginal from Pirlangimpi community, on Melville Island in the Tiwi Islands about 100km north of Darwin, left the community on foot on Friday night.

It's not known where he was headed, and he has not been in touch with his family since.

NT police say a two-metre crocodile was shot near the community's beach on Wednesday, and locals reported to police that biological material was found inside.

"At this stage it is unknown if the remains are human and testing will be undertaken," said Senior Sergeant Antony Deutrom.

The community, rangers and police continue to search for Mr Costa by foot and air.

"This is a very distressing time for the family and community," Snr Sgt Deutrom said.