Russia estimates as "very high" the probability that IS militants in Syria have used chemical weapons, Mikhail Ulyanov, the head of the Russian foreign ministry department for non-proliferation and arms control, has said.
"We have repeatedly noted the facts of the probable use of chemical weapons by IS militants and in a wider sense by Islamic radicals, starting with the attacks in Khan al-Assal [in Aleppo province] in March 2013 against government forces," Ulyanov said.
"Later there was East Ghouta in August 2013."
Russia claimed in July 2013 that it had evidence showing that a projectile that hit Khan al-Assal on March 19, 2013 contained sarin and was most likely fired by rebels. At least 27 people died in the attack.
There are reports that at least 25 Iraqi security forces have been killed in clashes with IS militants near Haditha in Anbar province.
The Organization for the Prohibition of Chemical Weapons (OPCW) has found indications that some Syrians have been exposed to sarin or a similar nerve agent, the BBC reports.
An OPCW report said it was investigating 11 chemical-weapon attacks alleged by Syria's government but did not say when or where the attacks happened or who was responsible.
U.S. Army Col. Steve Warren, the spokesman for the U.S.-led military operation against IS, says that the U.S.-led coalition and Iraqi Security Forces have retaken 40 percent of territory from the IS group in Iraq.
U.S. Army Col. Steve Warren, the spokesman for the U.S.-led military operation against IS, is tweeting updates from a press conference.
Warren says that IS's raids near Haditha in Iraq's Anbar province have not been successful because the Iraqi Security Forces are stronger and because of air strikes from U.S.-led coalition.
Reuters has a few more details on Siddhartha Dhar, the London man believed to be the masked IS militant who appeared in a recent IS video showing the killing of five men.
Dhar, who is also known as Abu Rumaysah, is one of Britain's most high-profile Islamists and an associate of Anjem Choudary, Britain's best-known Islamist preacher who is due to go on trial next week accused of terrorism offenses.
A convert from Hinduism who lived in east London, Dhar regularly attended protests staged by the now banned organization al-Muhajiroun and had often spoken to the media in support of radical Islamic causes.
Libyan activist Ahmed El-Gasir has tweeted this map showing the locations of the clashes between IS militants and the Petroleum Facilities Guard (PFG) near the oil terminal of Sidra.
Saudi Arabia and Iran owe it to the international community to put aside their differences in the Middle East and focus on opposing the IS group, German Foreign Minister Frank-Walter Steinmeier told newspaper Bild, Reuters reports.
There is a "huge fire" in an oil storage tank in Libya's Sidra port as IS militants resume shelling, the National Oil Corp. says.