Relatives of passengers missing on Malaysia Airlines Flight 370 hold placards after a joint press conference of the ministerial tripartite meeting on the search for the missing plane near Kuala Lumpur on July 22. Getty Images

The authorities investigating the disappearance of Malaysia Airlines Flight 370 have been overlooking more than 160 items that might belong to the victims of the mysterious plane crash. At least, that's according to the Air Crash Support Group Australia, a nonprofit aimed at supporting the families of people killed in aviation accidents.

The Australian Broadcasting Corporation reported exclusively Tuesday that a member of the group, Sher Kean, told the radio program PM that dozens of would-be personal belongings have turned up in Madagascar, but the Malaysia government doesn't appear to be concerned.

"Malaysia will not go and pick them up," Kean said. "Everything is still sitting there degrading … nobody cares. We have even written to the Malaysian Minister of Transport asking him to hand the items over into our possession if he's not interested in them, and we have had absolutely no response."

The group, which was established in 2012, told the ABC that people on Riake Beach in Madagascar have found clothing, phone cases and purses — all of which would have "come from internally in a cabin," Kean said.

The group laid out its case in detail on its website. It said Blaine Alan Gibson, a lawyer from Washington running his own MH370 investigation, discovered the debris near where he found a wing fragment officials later declared to likely be from the missing Boeing 777.

According to the group, Gibson "has been careful to point out that these may well have nothing to do with the personal effects of passengers on MH370." But because they've all been found in the same area as Gibson's wing fragment, "there is the possibility that these items may belong to passengers on MH370."

See photos of the would-be personal effects here.

MH370 disappeared in 2014 with 239 people on board flying from Kuala Lumpur to Beijing. Investigators have combed more than 110,000 square kilometers of ocean floor for any debris and are schedule to halt their search once they complete checking over the predetermined 120,000-square-kilometer region, though bad weather has complicated their efforts.