Last Monday Cyclone Gita destroyed houses and crops across large areas of Tongatapu and 'Eua and since then NEMO trying to organise supply drops to the various villages impacted.
However in the early hours of Wednesday morning a rock was thrown at a NEMO truck when returning from distributing aid.
Director Leveni 'Aho said no one was hurt but a complaint had been laid with police.
The truck was unmarked so he said he can't be sure if the damage was targeted.
Mr 'Aho said, in general, people appreciate what they are doing.
