Triyono Utomo, his wife and three children were arrested on 16 January after his return from Turkey.
Foreign Secretary also hints at working with Russia to wipe Isis 'off the face of the earth'.
The British PM discusses Isis, Nato, Iran and a renewed 'special relationship'.
The girl, identified only as Safia S, was ordered by Isis to carry out an attack in Germany.
The US president has promised to fight the terror group.
Exiles say Islamic State fighters still roam the streets of West Mosul in suicide vests and niqabs.
Taking the west side could prove much tougher; the jihadists are expected to put up a fierce fight as they are cornered in a shrinking area.
Alleged militant was arrested in raids following Istanbul Reina nighclub massacre.
The jihadist group is said to have beefed up security to prevent further escapes.
UN has warned 750,000 are in direct danger as the Iraqi army prepares its assault on Mosul.
The joint operation involved 9 Russian attack aircraft and 8 Turkish warplanes.
Muslim convert Kevin Guiavarch claims he rejected the terror group after his arrest.
Security sources in Mosul confirmed Abu Abdel Rahman, a Saudi leader, was in charge of executing women.
US-led coalition forces have begun bombing Isis positions in Rashidiyah, the last major district in north Mosul.
The Rubkan camp, in northeast Jordan, is home to at least 75,000 refugees.
Images show the affected building covered in rubble and riddled with bullets.
Interior minister Wolfgang Sobotka said the suspect, 18, was an Austrian citizen of a migrant background.
One monument was also destroyed by the militant group in the 2,000-year-old cultural site.
Iraqi soldiers in eastern Mosul have celebrated victory by pausing for selfies with Daesh corpses.
The YPG and the Kurdish-led Syrian Democratic Forces are advancing towards Raqqa, an Isis stronghold in Syria.
The US-led coalition also continued air strikes in Iraq and Syria against the Islamic State group.
The resumption of executions in Palmyra is a conspicuous propaganda effort by Isis.