The American citizen is currently being held by US forces in Syria pending instructions from the White House.
"If they take it down, there will be no graphic content but there will be no evidence."
Russia has been providing air cover for President Bashar Assad's troops since 2015, changing the tide of the war.
Duelling battles for Deir el-Zour highlight the importance of the oil-rich eastern province.
The air raids reportedly targeted Isis engineers so as to cut down their ability to use drones in attacks.
State media reports that troops advancing from the west broke the siege after IS defenses collapsed.
Child born to Syrian family who found asylum in Germany two years ago.
Defiant comments come as troops and pro-Iranian militiamen gain ground across the country.
Elliot Higgins of Bellingcat says vital evidence has been removed by the Google-owned platform.
One soldier was also taken hostage, the terror group said in a statement.
There are plans to rebuild Aleppo's great medieval mosques, souks, bath houses and citadel "with the same stones where we can".
Ryan Lock, 20, killed himself after telling his family he was backpacking inTurkey.
Some members are more in the club than others.
The Queer Insurrection and Liberation Army describe themselves as "faggots who kill fascists"
The 16-year-old schoolgirl, who has been named as Linda Wenzel, came from a small town near Dresden.
The death toll is said to rise as the injured are in critical condition.
US president issued plea a day before the two world leaders will meet for the first time at the G20 summit.
The Perth-born paediatrician blamed the US-led coalition air strikes for the destruction of Syria and the countless deaths.
The blaze hit the Lebanon camp which housed over 100 families.
Monitors say that the SDF had 'encircled' Raqqa, the de-facto capital of the Isis fiefdom.
More than 73,000 migrants have landed in Italy this year, an increase of 14% over last year's figures.
An attack on the Human Rights Act is an attack on us all
