Jeremy Clarkson is to be investigated by Ofcom after the media regulator received more than 800 complaints that the BBC's The One Show broke broadcasting rules.
During his appearance on the show, the Top Gear presenter said public sector workers who were striking on November 30 should be "executed in front of their families" and caused further offence by describing people who kill themselves by jumping under trains as "selfish".
Ofcom is looking into whether the comments are in breach of code 2.3, relating to generally accepted standards ensured by broadcasters, which "must ensure that material which may cause offence is justified by the context".
"Ofcom has taken the decision to investigate comments by Jeremy Clarkson on BBC's The One Show. We will make the outcome of the investigation known in due course," the regulator said in a statement.
The BBC received almost 32,000 complaints related to Clarkson's appearance on the show. But director-general Mark Thompson said he would not fire the presenter.
Clarkson later apologised for his comments saying he did not intend for the remarks to be "taken seriously- as I believe is clear if they are seen in context."