CAIRO, Nov. 7 (Aswat Masriya) - There is still no conclusive cause for the downing of the Russian plane last week, said Ayman al-Moqadem, a pilot and the head of the Egypt-led committee investigating the crash at a press conference Saturday.

All "scenarios are on the table," he said, adding that could not provide a time frame for when the investigation will likely be concluded. 

"We have still not collected all the information that will be used to make an analysis," he said. After the information-gathering, the information will be refined, Moqadem said. 

Even though the investigation is still underway, theories on the downing of the plane abound. The U.S. and the UK have officially entertained one possibility that the Russian civilian flight downed on Oct. 31, was brought down by a bomb planted on board, sending ripples across the world and raising questions on Egyptian airport security.

British Prime Minister David Cameron said on Thursday that the UK has based its decision on intelligence. 

However, Moqadem said the committee has not reached "any conclusions," adding, "we are willing to receive information" from any party willing to provide it. He said the committee has so far not received any such information supporting media reports that are citing "confirmed intelligence."

Earlier on Saturday, Egypt's foreign minister said states that have announced that the Russian plane crash was caused by a bomb have not shared information in detail with Egyptian security apparatus. 

Among the observations Moqadem shared, was that the plane's wreckage was spread over more than 13 square kilomteres, meaning that it broke up midair, which is one thing that experts have agreed on from the start. 

The preliminary observations "so far do not allow for determining the cause of this breakup," he said. 

Egypt recovered the black boxes on the day of the crash, which left no survivours among the passengers and crew, most of whom were Russian. 

There are two types of black boxes, a Cockpit Voice Recorder (CVR) and Flight Data Recorder (FDR), both designed to sustain damage during an accident and both typically, vital for concluding the cause of a crash.

Moqadem said the CVR contents were heard in full and a sound was heard in the last second that will need to be analysed through "spectral analysis."

According to statements made last week by an unnamed source who spoke to Russian news agency Interfax, "uncharacteristic sounds" were heard in the cockpit at the time of the plane's disappearance. 

Moqadem said contents of the CVR are still being transcribed, which will still take some time.

He added that wreckage of the plane will be moved to Cairo in a safe place for further analysis, adding that some parts of the plane have still not been found. 

The recording on the FDR lasted exactly 23 minutes and 14 seconds, he said, registering a final altitude of 30,888 feet while still ascending. The autopilot was engaged until the end of the recording, Moqadem added. 

The Airbus A321 was operated by a Russian airliner and carried 209 Russian passengers, four Ukrianian passengers, one person from Belarus and three people who's nationalities are unknown. It took off from the tourist hub Sharm el-Sheikh before crashing in the Sinai desert 23 minutes later.

The investigative team is made up of a total of 58 people, including 29 from Egypt, seven from Russia, six from France where the plane was designed, three from Ireland where it was registered and two from Germany where it was manufactured.

Additionally, 10 consultants from Airbus and a representative from the European Aviation Safety Agency are on the committee. 

After both the U.S. and UK lent support to the possibility that the Russian civilian flight was brought down by a bombing last week, Russia decided to halt flights to Egypt, but added that it was too soon to draw conclusions. 

The Russian decision to suspend flights, comes after a UK decision to suspend all their flights from and to Sharm el-Sheikh, with exceptions made only for citizens currently stranded in the resort city trying to return at the end of their holidays.

Coming a little over a month after Egypt "mistakenly" killed eight Mexican tourists and four Egyptians in al-Wahat area in the western desert, this Russian plane crash has sparked fears in Egypt on the potential damage it will mean for Egyptian tourism.