Russia Rules Out Explosion in Military Plane Crash

TOPSHOT - Russian police officers look at the rescue vessels searching the Black Sea outside Sochi, on December 27, 2016,  two days after a military plane carrying 92 people, including dozens of members of the Red Army Choir, crashed in the Black Sea. The main black box of the Syria-bound Russian military plane that crashed into the Black Sea with 92 people onboard has been found in a massive ongoing search operation, authorities said on December 27, 2016.  The Tu-154 jet, whose passengers included more than 60 members of the internationally renowned Red Army Choir, was heading to Russia's military airbase in Syria when it went down off the coast of Sochi shortly after take-off on December 27.  / AFP / VASILY MAXIMOV        (Photo credit should read VASILY MAXIMOV/AFP/Getty Images)

TOPSHOT – Russian police officers look at the rescue vessels searching the Black Sea outside Sochi, on December 27, 2016, two days after a military plane carrying 92 people, including dozens of members of the Red Army Choir, crashed in the Black Sea. (Credit: VASILY MAXIMOV/AFP/Getty Images)

(CNN) — Russian investigators have found no evidence of an explosion or fire on a military plane that crashed into the Black Sea on Sunday with 92 people on board, an air force official said Thursday.

Terrorism has not been ruled out as the cause of the crash, but it is not a primary line of investigation, the air force’s deputy head of flight safety, Sergey Bainetov, told the state-run TASS news agency.

The Defense Ministry has said there are probably no survivors.

Bainetov said the full investigation would take a month.

“The search operation continues as we need to recover more fragments to conclude the investigations,” he said.

Transport Minister Maxim Sokolov said it has been established that “the plane almost completely fell apart after it hit the water surface and the sea shore, which has naturally complicated the search operation,” Russia’s Sputnik news reported.

More than 130 square kilometers of the sea have been examined. Teams have found 2,000 fragments of the plane, 19 bodies and 230 body parts, Sputnik reported.

The Tupolev Tu-154 was carrying 84 passengers and eight crew members when it crashed.

Both black boxes — the cockpit voice recorder and flight data recorder — have been recovered and are being studied.

Those on board included 64 musicians from the army’s official choir, the Alexandrov Ensemble; nine reporters; the head of the Spravedlivaya Pomoshch charity, Elizaveta Glinka; two federal civil servants; and eight crew members.

The choir was flying to Syria to perform for Russian air force pilots during the holiday season, the Defense Ministry has said.

Glinka was taking medicine and other supplies to a local hospital in Syria, her colleague and friend Dr. Sergey Kurkov told CNN affiliate RBC.

The plane had taken off from Moscow and was headed to the Russian Hmeymim air base in Latakia, Syria, where Russia has a large military presence. En route to Syria, the plane landed in Sochi to refuel.