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.
Iraqi forces recaptured the eastern half of the nation's second city and are now eyeing the west.
Iraqi commanders announced the victory three months after the assault on Mosul began.
The Counter-Terrorism Service has taken control of the eastern bank of the Tigris river, according to military sources.
Bashar al-Assad's strategy has enabled Islamic State to regain ground.
Turkish authorities have captured the Uzbek national who killed 39 people on New Year's Eve in Istanbul.
A manhunt for the alleged terrorist has been underway since the New Year's Day attack.
Iraqi forces claim to have liberated 90% of the eastern part of Mosul as thousands flee the city.
The area is of strategic importance to Daesh, linking Raqqa and territory in Iraq.
Lawand Hamadamin's parents fled Iraq after hearing rumours Isis wanted to kill disabled children.
Peter Cook said the counter-Isis campaign is continuing to target senior leaders, including chief Abu Bakr al-Baghdadi.
Cameroonian President Paul Biya urged citizens in January 2016 to use witchcraft to fight Boko Haram.
The Iraqi government recently said it had so far liberated 70% to 80% of east Mosul from Isis.
Ryan Lock's body believed to have been held by Isis before it was recovered and taken to north-east Syria.
The suspects were stopped by Singapore's Immigration Checkpoint Authority while trying to enter Singapore.