NetJets is not speculating on what caused one of its planes to crash onto a highway in Laredo, Texas late Tuesday, killing a prominent tech entrepreneur.

"The plane was carrying six people when it crashed on Loop 20 in Laredo, Texas, shortly after 10 p.m., ..."

The jet, owned by Warren Buffett’s Berkshire Hathaway, lost contact with air traffic control and crashed in Laredo