"What is the cause…we will wait and see until the investigation is over, to early to see… There is no doubt that there was no bomb aboard,"" al-Ghaith told reporters.
FlyDubai Boeing 737-800 plane coming from Dubai crashed at about 03:50 Moscow time (00:50 GMT) on Saturday while attempting landing amid poor weather conditions at the Rostov-on-Don Airport (ROV). All 62 people on board, 55 passengers and seven crew members, died in the crash.
"FlyDubai airline will release the first results of the investigation [into the crash] within a month," al-Ghaith added.
Investigators earlier found the crashed plane's first and second flight data recorders, and its first voice recorder.
The Investigative Committee presented three versions of the cause of the tragedy: a technical fault, severe weather conditions and human error.