The death toll in the Syrian gas attack has climbed to 72.
The victims were killed in Khan Sheikhoun, Syria, after a chemical gas had been dropped from “unknown” war planes. More than 550 people were injured.
Local health workers said the death toll could rise and eventually reach 100.
Witnesses also said that the clinics treating the injured were then targeted by airstrikes.
A suspected chemical attack killed dozens of people in a rebel-held area of Syria on Tuesday, activists said, describing an incident that would mark one of the worst of its kind in Syria's six-year civil war.
At least 83 people - including 25 children - died and at least 350 others were injured in the incident in northern Idlib province, southwest of Aleppo, the relief agency UOSSM told NBC News.
UOSSM, formally known as the Union of Medical Care and Relief Organizations, is a nonprofit coalition of groups treating to victims of the war in Syria.
A native of Kyrgyzstan who had a Russian passport was responsible for the deadly blast in St. Petersburg, the Kyrgyz and Russian authorities said on Tuesday, as the toll from the attack rose to 14 dead and more than 60 injured.
The Investigative Committee of Russia, the main federal law enforcement agency, released a statement saying that the man who detonated the bomb on a subway car was Akbarzhon Dzhalilov, 22.
Forensic experts also found his DNA on a bag left at the Vosstaniya Square metro station, the statement said.
At least 10 people have been killed and 50 more injured in explosions in the St Petersburg metro system.
There were blasts in two metro carriages at two stations, St Petersburg emergency services said.
News agency Interfax cited a source as saying at least one of the blasts was caused by a bomb filled with shrapnel.
Fifty people were injured in the blasts, Andrey Kibitov, the head of the city governor's press service said on Twitter.
U.S. Pacific Command has deployed the first elements of the Terminal High Altitude Area Defense system, known as THAAD, to South Korea, implementing the U.S.-South Korean alliance’s July decision to bring the defensive capability to the Korean Peninsula.