Saudi Arabia has recalled its envoy to Libya over an alleged plot to
assassinate Crown Prince Abdullah.
Crown Prince Abdullah has led Saudi Arabia since 1995
Saudi Foreign Minister Prince Saud al-Faisal said that Libya's ambassador in Riyadh would also be asked to leave.
The alleged plot involved a prominent American Muslim activist who was jailed in the United States earlier this year for breaking a US embargo on Libya.
The crown prince has been de facto ruler of the oil-rich kingdom since his brother King Fahd suffered a stroke.
The alleged plot against his life came to light when US investigators outlined their case against US Muslim activist Abdurahman Alamoudi in July.
Alamoudi claimed to have contacted - on behalf of the Libyan government - a group of Saudi dissidents in London plotting to assassinate Prince Abdullah.
Founder of the American Muslim Council
and president of the American Muslim Federation, he was eventually jailed for 23 years for violating US laws restricting financial dealings with Libya.
Tripoli has denied involvement in a conspiracy against Prince Abdullah.
Prince Saud said Riyadh was limiting its diplomatic censure of Libya to the withdrawal of ambassadors.
"The kingdom is confining itself to these measures... in appreciation of the brotherly Libyan people, especially with the approach of the Hajj pilgrimage season," he said.
The Saudi embassy in Tripoli will remain open and Libya's embassy in Riyadh will also be allowed to remain open, he said.