Securities regulators are likely to investigate issues surrounding the health of Apple chief executive Steve Jobs, Bloomberg reported Friday.

The Securities and Exchange Commission may look into how Jobs' health diagnoses unfolded and why the company announced he was taking a five-month medical leave abruptly. The examination is being led by the SEC's San Francisco office, according to a person familiar with the matter.

In early January Jobs said that he needed a relatively simple treatment for a nutritional ailment but nine days later, he announced that his health issues were more complex.

Securities law requires that companies disclose information material to their shareholders but it doesn't contain an explicit provision governing the health of executives, Bloomberg noted.