Five people died when a helicopter used by Malaysia's "flying doctor" service crashed in Sarawak on Tuesday, according to authorities. The helicopter, a Bo-105, was carrying a pilot and four health ministry staff, including a medical officer, an assistant medical officer, and two nurses who were on official duty, according to Health Minister Dzulkefly Ahmad. The crash occurred near Long Lellang short take-off and landing airport on the island of Borneo. The Civil Aviation Authority of Malaysia confirmed the helicopter was carrying five people when it crashed after the Flight Information Service notified the authority of the incident at 3:58 pm the previous day. A disaster management committee official in Miri, Sarawak, confirmed to the state news agency Bernama that all five people aboard had died in the crash. Investigators from the Air Accident Investigation Bureau are expected to arrive in Miri at 2 pm on Wednesday to begin examining the crash, according to the Civil Aviation Authority of Malaysia's chief executive, Datuk Captain Norazman Mahmud. The helicopter wreckage at the crash site will remain undisturbed following instructions from the AAIB, and the site has been cordoned off and secured. Search and recovery operations were set to resume on Wednesday, with a Fire and Rescue Department helicopter carrying 18 personnel departing Miri for Long Lellang at 7 am. Two police helicopters carrying 11 personnel were due to join the operation, along with four police officers from Long Lama and four Malaysian Maritime Enforcement Agency personnel from Miri. Police are expected to oversee the identification of victims at Miri Hospital, including DNA comparisons with their families. Search operations on Tuesday were hampered by hazy conditions, with rescuers barred from using air services, according to Sarawak police commissioner Mohamad Zainal Abdullah. He added that the crash site was in a remote area requiring a ten-hour journey by road. Sarawak has been badly affected by haze from forest fires in neighboring Indonesia, with many areas recording unhealthy air quality levels, according to government data released on Wednesday. Malaysia declared an emergency last week in Sarawak's Serian district after air pollution reached hazardous levels, though the declaration was lifted after air quality improved.