The accident happened late yesterday in the badly hit Tanah Merah district in Kelantan state near the Thai border as the helicopter was trying to deliver food packages to victims of the deluge, Kelantan police chief Mazlan Lazim told AFP.
The injured helicopter crew were hospitalised following the accident, but one had already been discharged, he said.
"Despite the incident, we are continuing to ferry aid via air because some roads are damaged," Mazlan added.
The region is regularly hit by flooding during the annual monsoon, between November and March, but this year's storms have been unusually powerful and Kelantan, Terengganu and Pahang states have been particularly hard hit.
Floodwaters have started to subside in many areas but authorities are bracing for possible disease outbreaks.
"We anticipate that flood victims will come in masses seeking care once the floodwaters start to recede," Noor Hisham Abdullah, health ministry director-general, said in a Facebook posting.
