Bahrain's king is quoted by a British newspaper as saying some members of the opposition in Gulf kingdom are being trained by Syria.
King Hamad bin Isa Al Khalifa was quoted by Britain's Telegraph newspaper Tuesday that he has notified Syrian authorities of the allegation, but they deny involvement.
The king's interview coincided with his visit to London on Monday to meet with British Prime Minister David Cameron.
Bahrain's Sunni monarchy has previously accused Iran of involvement in widespread protests this year led by Bahrain's Shiite majority. Syria is a longtime ally of Iran.