YNAGON, June 23 (AFP) – Ousted Myanmar leader Aung San Suu Kyi has been moved from house arrest to solitary confinement in a prison compound in the military-built capital Naypyidaw, a junta spokesman said on Thursday.

"In accordance with criminal laws... (Aung San Suu Kyi) has been kept in solitary confinement in prison" since Wednesday, Zaw Min Tun said in a statement.

Since her ouster in a coup last year, Suu Kyi had been under house arrest at an undisclosed location in Naypyidaw, accompanied by several domestic staff and her dog, according to sources with knowledge of the matter.

The Nobel laureate, 77, left those premises only to attend hearings for her trial in a junta court that could see her handed a prison sentence of more than 150 years.

Suu Kyi had on Wednesday been "transferred to prison", a source with knowledge of the case told AFP, speaking on condition of anonymity.

Her staff and dog had not accompanied her, the source said, adding that security around the prison compound was "tighter than before".

"Aung San Suu Kyi is in good health as far as we know," they added.