Swaziland's justice minister has resigned following allegations he was having an affair with one of King Mswati III's 13 wives.
The prime minister said Ndumiso Mamba had resigned from his position as both cabinet minister and senator.
He said it was because of "allegations circulating in the country".
Correspondents say Mr Mamba's alleged affair with Queen Nothando Dube was first reported in neighbouring South Africa's media.
The king's 12th wife has reportedly denied the allegations and there has been no comment from Mr Mamba.
But Prime Minister Sibusiso Dlamini said Mr Mamba had agreed to step down so the allegations could be investigated.
"I have consulted with him and he has forthwith resigned," said the prime minister in a statement.
Some Swazis are critical of King Mswati - an absolute monarch whose lavish lifestyle and many wives contrast with the poverty of many of his subjects.