Ten packages of a suspicious white powder believed to be cocaine have washed up on an island in Queensland's far north, and police have warned there could be more.
Walkers found the packs, each weighing a kilogram, on a beach at Ramsay Bay, Hinchinbrook Island, on Sunday.
Forensic analysis is being conducted on the powder, which police believe is cocaine.
The end use value on the Australian market is approximately $3 million, and Detective Inspector Kevin Goan asked members of the public to be on the lookout for more packages.
"The concern that we have currently is that there may be other packages, and we would ask that any member of the public that frequents the Hinchinbrook Island area, if they could be on the lookout for it and to let us know," he said.
If additional packages are found, he asked for them to be left where they are for police to recover.
Police are trying to work out where the packages came from and who owns them.
They have called for anyone with any information to contact them.
"Anyone who was at sea or on the coastline near these locations and saw anything suspicious in the water or other suspicious activity is urged to contact police," Acting Senior Sergeant Graham Camp said in a statement on Thursday.