Tesla's Model S and Model X were not available for order in some Asia-Pacific countries, including Australia, Thailand, Singapore and New Zealand, the automaker's website showed on Sunday.

Other Tesla Inc models, such as Model 3 and Model Y were available in these countries, according to the website.

It was not immediately clear why these models were not available. Tesla did not immediately respond to a request for comment.

Elon Musk's electric vehicle maker posted record deliveries in the January-March quarter, but deliveries of higher-priced Model X and Model S vehicles slumped by 38%.

Tesla has been aggressively cutting prices for some of its models this year across markets to juice demand as competition among electric-vehicle makers heats up around the world.

Investors have been watching Musk's gamble that cutting prices would stimulate sales, although they worry about eroding margins.