Hila Sedighi, a popular Iranian poet who had in the past criticized state repression and campaigned for an opposition presidential candidate, has been detained by authorities, relatives said.
Thousands of Iranians held anti-Saudi protests across the country on January 8 condemning Riyadh's execution of a prominent Shi'ite cleric that has sparked renewed tensions between the two regional rivals.
Iranian Princess Ashraf Pahlavi, the twin sister of the last shah of Iran, has died at the age of 96.
A Republican bill to increase U.S. congressional oversight of the Iran nuclear deal cleared a key committee on January 7 and is headed for a vote in the full House next week.
The rising tensions between Tehran and Riyadh have reached into the sports arena, with the Saudi soccer federation citing security concerns for saying it will not participate in matches in Iran.
U.S. Secretary of State John Kerry has said a comprehensive nuclear deal between Iran and world powers may be "days away from implementation, if all goes well."
Pakistani Prime Minister Nawaz Sharif has expressed "deep concern" about the growing rift between Iran and Saudi Arabia and called on the two nations to peacefully resolve their differences.
As Iranian-Saudi tensions soar over Riyadh's execution of a prominent Shi'ite cleric, here's a sample of how Iran and Saudi Arabia see each other -- in cartoons.
Iran has accused Saudi warplanes of damaging its embassy in Yemen's capital, Sanaa, and injuring staff in an air strike. The Saudi-led coalition fighting Shi'ite rebels in Yemen rejected the claim.
The White House is seeking to help Iraq's leadership prevent a diplomatic rift between Saudi Arabia and Iran from aggravating sectarian conflict in Iraq and undermining recent victories against the Islamic State group.
A professional Iranian soccer player has been jailed after photographs published on social media showed him together with several women not wearing the Islamic hijab, as required by Iranian law.
Based on the responses coming out of the Islamic republic, anyone and everyone could have been responsible for ransacking and setting alight the Saudi Embassy in Tehran.