Oklahoma City Thunder plane in apparent mid-air collision

"What animal/thing flies at the same altitude as a plane and can cause this???" tweeted Oklahoma City Thunder's Spanish player Álex Abrines after the NBA team's plane suffered major damage in mid-air on Friday night.
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The aircraft's nose was left completely caved in after an apparent collision with an as yet unidentified object as Oklahoma flew to Chicago following their defeat to Minnesota Timberwolves.
No-one was hurt in the incident, which is understood to have occurred at around 30,000 feet.
Here's the state that Oklahoma's plane was left in:
Hey @NASA @neiltyson @BillNye
— Steven Adams (@RealStevenAdams) October 28, 2017
We had a rough flight to say the least.
30000 feet in the air.
Flying to chicago.
What caused this? pic.twitter.com/uEVrEm7noi
Que animal/cosa vuela a la misma altura que un avion y puede causar esto???😱😱😱 pic.twitter.com/rb9P5i9Sl4
— Alex Abrines (@alexabrines) October 28, 2017
I guess we hit something? 30,000 feet up... pic.twitter.com/Rem9GmwRKq
— Josh Huestis (@jhuestis) October 28, 2017
