NAYPYIDAW, Oct 12 (Reuters) - A court in military-ruled Myanmar on Wednesday sentenced deposed leader Aung San Suu Kyi to three years in prison on charges of accepting a bribe, a source with knowledge of the matter said.

The 77-year-old Nobel laureate, a figurehead of opposition to military rule, faces charges for at least 18 offences ranging from graft to election violations, carrying combined maximum terms of nearly 190 years.

Suu Kyi has called the accusations against her absurd and denied any wrongdoing. She is being held in solitary confinement in the capital, Naypyitaw, and her trials have been conducted in closed courts.

The latest charges were related to allegations Suu Kyi accepted bribes from a businessman, said the source, who declined to be identified due to the sensitivity of the issue.

Suu Kyi received three-year jail sentences on two charges, to be served concurrently.