"Prices increasing due to major supply chain price pressure industry-wide. Raw materials especially," Musk said in a tweet.

He was responding to an unverified Twitter account called @Ryanth3nerd, which said, "I really don't like the direction @tesla is going raising prices of vehicles but removing features like lumbar for the Model Y..."

In May, Tesla increased its Model 3 and Model Y prices, the automaker's fifth incremental price increase for its vehicles in just a few months, the Electrek website reported https://bit.ly/3c9PPVo.

During an an earnings conference call in April, Musk said Tesla had experienced "some of the most difficult supply chain challenges," citing a chip shortage. "We're mostly out of that particular problem," he added at the time.

In response to the removal of lumbar support on the passenger side in Tesla's Model Y, Musk said, "Moving lumbar was removed only in front passenger seat of 3/Y (obv not there in rear seats). Logs showed almost no usage. Not worth cost/mass for everyone when almost never used."

Earlier on Monday, the Electrek reported https://bit.ly/2R9fmqx that new Tesla Model Y owners are reporting that their electric SUVs are being delivered without lumbar support on the passenger side.

(Reporting by Nandakumar D in Bengaluru; additional reporting by Hyunjoo Jin; editing by Richard Pullin)