A California school has fired back at Charlie Sheen after he urged his fans to smear the campus with dog poo.

The 'Anger Management' actor claimed that his nine-year-old daughter Sam - whose mother is actress Denise Richards - was ''bullied out'' of Viewpoint School in Calabasas and branded a liar, and asked his Twitter followers to make clear their disgust at the ''abhorrent disrespect'' shown to his little girl by delivering ''rotted egg a roll of toilet paper or some dog s**t there.''

But a spokesperson for the school hit back at the 49-year-old actor's claims on Twitter on Thursday (14.03.13), writing: ''Viewpoint School's highest priority is the safety, security and education of our students.

''The parent of a former Viewpoint School student who has not attended Viewpoint School since March, 2012 has made certain accusations in the media ... Our administrators addressed the issue appropriately [last year].

''Our School takes accusations of bullying very seriously. For over 50 years, Viewpoint School has provided a safe and nurturing environment for our students to thrive, and we will continue to do so.''

The outspoken star - who also has daughter Lola, seven, with Denise, four-year-old twins Bob and Max with former spouse Brooke Mueller and adult daughter Cassandra with ex-girlfriend Paula Profit - appeared to single out one person in particular to bear the brunt of his wrath.

He added: ''And if your feeling the ''show and tell'' of it all, smear the s**t to spell one name on the front door; VICTORIA. eat that loser. c (sic)''

According to gossip website TMZ.com the school has increased its security following Charlie's ''call to arms'' and a police car was spotted outside on Thursday.