The malicious messages arrived in June and appeared to target human rights activists.
The arrests are at odds with the progressive image the government has projected this year under Crown Prince Mohammed bin Salman.
Iranian lawmakers want Rouhani to explain why, after more than two years of signing a nuclear deal, Iranian banks still only have limited access to global financial services.
New footage of Israeli strikes against Iranian targets in Syria released.
After an all-caps tweet, what does the United States president have planned for Iran?
"How can Trump prove to the Iranian nation that his comments of last night reflect a true intention for negotiation and have not been expressed for populist gains?"
Between 1,000 and 1,500 IS insurgents who had been holding their ground in the area yielded under intensive Russian bombing from the air, a regional intelligence source said.
"Respect for the great nation of Iran, the reduction of hostilities, and America's return to the JCOPA, will smooth the path past the current rocky relations."
Assad has flagged his next target: the rebel-held Idlib province. "Now Idlib is our target, although not only Idlib," Assad told Russian media last week.
"I'd meet with anybody. I believe in meetings," especially in cases where war is at stake, Trump said.
"We cannot dictate to Israel how to proceed."