Hollywood actor Charlie Sheen has posted a racist comment on US President Barack Obama, calling him "Barry Satera Kenya`.

"Barry Satera Kenya u won't attend a soldier's funeral uhkros da street that u kild yet u hav time 4 brackets? s a d," the actor posted on his Twitter page on Wednesday.

"Barry Satera Kenya" refers to Obama's African heritage, as his father came from Rachyuonyo District in Kenya, even though Obama himself was born in Hawaii. The meaning of word 'Satera' is still left unexplained, reports aceshowbiz.com.

The 49-year-old's anger appeared to be fuelled by Obama's appearance at the bracket on ESPN, an annual tradition during his presidency, instead of attending a soldier's funeral.

The soldier's funeral that Sheen refers to may be the funeral of a two-star general, who was killed in Afghanistan.

However, his accusation that the funeral had been ignored by the administration was incorrect since the ceremony was attended by US Defense Secretary Chuck Hagel.

The tweet sparked an outburst from other Twitter users.

One of the users who commented on Sheen's tweet, wrote: "He can't attend every funeral, grow up", while others said that mentioning Kenya in his tweet was racist.