Despite accusations by Sunni Gulf leaders that Tehran was stirring up protest in the Shia-majority state, the Independent Commission of Inquiry said “no clear link” was shown between the events and Iran.
The inquiry found that they had not been involved in human rights violations.
The government accepted the findings of the inquiry’s reports, which it commissioned, and King Hamad al-Khalifa declared himself to find out about mistreatment of prisoners.
"We do not tolerate the mistreatment of detainees and prisoners. We are dismayed to find that it has occurred, as your report has found," he said.
There were clashes in two Shia areas before the report’s publication.
Police used teargas against protesters in Aali village early in the morning and clashed with mourners on Sitra island during a protest at the death of a 19-year-old hit by a police car on 19 November.