Kanye West has deleted his Twitter and Instagram accounts, leaving his millions of followers speculating over the reason.

The rapper superstar, who had some 27 million followers on Twitter and was ranked in the top 50 on the site for most-followed accounts, has not given an explanation for his sudden departure.

Nor did his wife, Kim Kardashian, comment on his behaviour as she publicised a children's clothing line which she said West had helped design.

"Kanye hand drew our KIDS logo," she wrote.