Robin Gibb's battle with cancer has taken a turn for the worse, as the former Bee Gee's member has entered into a coma.

Bee Gee Robin Gibb remains in a coma at a hospital in London after suffering from pneumonia.

Gibb's family have been keeping vigil at his bedside at a hospital in Chelsea, west London.

The singer was diagnosed with cancer almost a year and a half ago, and this current medical setback is a result of his long battle.

The British-born singer had surgery on his bowel 18 months ago for an unrelated condition, but a tumour was discovered and he was diagnosed with cancer of the colon and later of the liver.

It had been thought his cancer was in remission as early as last month.

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