Australian Red Cross is taking a break from posting on social media in the midst of its bushfire fundraising campaign after reporting "security incidents" to police.

A Red Cross spokeswoman said an incident had been reported to Victorian authorities but would not elaborate on the matter.

The Australian Red Cross. Credit:Tamara Dean

"We're taking precautionary steps to ensure that the safety of our volunteers and staff remains paramount," she said.

It comes after accusations emerged this week that the organisation had withheld about two- thirds of $95 million in bushfire donations.