South Sudan's brutal civil war has left almost 400,000 people dead, a new study by a British university said Wednesday, an estimate about eight times the figure usually cited.
Iranian forces have backed Syrian President Bashar al-Assad in the country's civil war.
The United Nations has invited Yemen's government and Iran-backed Houthi rebels to Geneva next month for talks on resolving the country's civil war, a spokeswoman said on Friday.
Northwestern Syria, where Idlib is located, is the last big area still in the hands of fighters seeking to overthrow President Bashar al-Assad.
Hun Sen, who came to power in 1985 in a country still plagued by civil war, has cracked down on dissent in the run-up to this year's poll.
South Sudan offered to allow a rebel representative to join its government on Friday, but ruled out Riek Machar, saying they had "had enough" of the rebel leader after five years of civil war.
It further cements President Bashar al-Assad's dominant position over the most populated parts of Syria after years of fighting, but means any new military campaign might risk direct conflict with foreign powers.
More than 300 people have been killed in the rural eastern Ghouta district on the outskirts of Damascus since Sunday night, and many hundreds have been wounded, according to human rights monitors.
Pro-government forces fired rockets and dropped barrel bombs from helicopters on the towns and villages of the rural district just outside Damascus.
Lasantha Wickrematunga, a prominent critic of the former administration, was stabbed days before he was due to testify in a corruption case involving the then defence minister Gotabhaya Rajapakse.
Saudi Arabia and its allies struck a day after Saleh's son vowed to lead a campaign against the Iran-aligned Houthis.
Ali Abdullah Saleh announced on Saturday he was ready to turn a "new page" in ties with the Saudi-led coalition fighting in Yemen if it stopped attacks on Yemeni citizens.