Malaysia Airlines diverted one of its planes from Ukraine to another war zone: Syria.

On Sunday, the airline re-routed its flight MH4 from Kuala Lumpur to London over Syrian airspace, after the Ukraine route was closed in the wake of Flight 17's downing last Thursday.

Flightradar24, a website that tracks the routes of airlines, shared an image via its Twitter account on Monday with the statement: "Malaysia Airlines flight MH4 (Airbus A380) flew over Syria yesterday."

After Malaysia Airlines Flight 17 was shot down by a surface-to-air missile in eastern Ukraine, flights have avoided Ukranian airspace, and the European Organization for the Safety of Air Navigation (Eurocontrol) is rejecting flights over the area.

"All flight plans that are filed using these routes are now being rejected by Eurocontrol. The routes will remain closed until further notice," the agency said on its website.

Malaysia Airlines flight path: Ukraine vs. Syria.

A Mashable investigation showed that multiple airlines regularly fly across conflict zones, but in the wake of last Thursday's disaster, it was thought these routes may be reconsidered.

Fredrik Lindahl, CEO of Flightradar24, told Reuters that it was unusual to witness transcontinental flights crossing Syria, which is in the middle of a bloody civil war, though regional flights could often be seen passing through.

"With Iraq you always see aircraft flying there. There is no other way to access parts of the Middle East than to use the Iraq corridor," he said. "But you don't see Syria so often. We saw no other trans-continental flight that went through Syrian airspace yesterday."

Malaysia Airlines flight MH4 (Airbus A380) flew over Syria yesterday http://t.co/MpWz4dKljl pic.twitter.com/nH8fGeIAlw — Flightradar24 (@flightradar24) July 21, 2014

Malaysia Airlines released a statement acknowledging that a flight flew through Syrian airspace on Sunday, but referred to the Flightradar24 tweet as a "misunderstanding."

"MH004’s flight plan is in accordance to International Civil Aviation Organisation’s (ICAO) approved routes. As per the notice to airmen (NOTAM) issued by the Syrian Civil Aviation Authority, the Syrian airspace was not subject to restrictions," the airline's statement said.

"At all times, MH004 was in airspace approved by ICAO. Malaysia Airlines maintains that safety of its passengers and crew is of utmost priority."