The Top Gear presenter has promised to hunt down the people who hacked him yesterday (February 18).
"I have been hacked by spammers," he tweeted. "Luckily I have acquired a special set of skills over many years. I will find them. And I will kill them.
"Unlike some people, I WILL find who hacked my account. And I will visit them."
Followers were surprised yesterday when links to weight-loss blogs were posted on Clarkson's feed.
Top Gear returned for its 19th season on the BBC on January 27.