Saad Hariri has announced his resignation as Lebanon's prime minister and implicitly blamed Iran and its Lebanese ally, Hezbollah, for his decision.
In a televised speech on Saturday, he said he suspected there were covert plans to target his life, but he did not elaborate.
Hariri, who made the statement during a visit to Saudi Arabia, said Iran planted "disorder and destruction" in the country and meddled in the internal issues of Lebanon as well as other Arab countries.
Referring to Hezbollah, which is backed by Iran, Hariri said, "Iran's arm ... has managed to impose a fait accompli on Lebanon through the power of its weapons" in the last few decades.