Major organisations have withdrawn adverts on social networking site ask.fm following the suicide of teenager Hannah Smith.
Despite the company saying that it does "not condone bullying of any kind", several major firms have pulled ads, including:
Business Editor Laura Kuenssberg reports:
Hannah, 14, was found dead on Friday after being bullied on the social networking site.
A statement from ask.fm said they wanted to "reassure all users and parents of users that we are committed to ensuring that our site is a safe environment".
They added: "We do not condone bullying of any kind, or any form of unacceptable use of our site."
Ask.fm described the teenager's death as a "true tragedy" and said they had been speaking to Leicestershire Police since the incident.
Earlier, David Cameron called for internet users to boycott "vile" cyber bullying websites and said he was looking at what action to take "to try and stop future tragedies likes this".
David Smith, the father of Hannah, told the Daily Mirror that the Prime Minister was "passing the buck" on cyber bullying.
Leicestershire Police confirmed they had been contacted by Hannah's father about further claims of "inappropriate postings" on Facebook.