Prosecutors said that the two had planned to help the gunman find shelter after the attacks in the city that left two people dead this weekend.
Omar Alkhani, who was also held hostage by ISIS, said he hoped the militants would release her, realizing she was in Syria only to help people.
Egypt's Sisi vowed to avenge the killings of the members of the oft-persecuted Christian sect. President Obama condemned the killings.
A 22-year-old with ties to gangs and a criminal record was identified by a Danish tabloid.
ISIS opposes all phone use amid concerns residents will share sensitive information that would help the U.S.-led airstrike campaign.
Denmark's top spy chief says authorities are considering that the suspect in Saturday's shootings might have been inspired by the events in Paris.
The Islamic State group poses a "direct threat to the USA," according to 84 percent of Americans surveyed in a recent poll.
Authorities in Denmark say they think a man killed in a shootout with police early Sunday was responsible for both of the Copenhagen attacks.
ISIS' English-language magazine wrote that Japan was not on the group's list of priority targets.
All that is separating the Islamic State group from Baghdad is just three miles and a U.S. Marine Corps base.
Boko Haram continues to attack villages in northeastern Nigeria, but it's also pushing into neighboring countries.
At least five civilians were killed in the Nigerian insurgent group's first attack inside chad early on Friday.
The attack follows a similar one on a Shia congregation hall in the Shikarpur district two weeks ago, in which over 60 people were killed.
"This is not permissible, Sheikh," said a note in Arabic reportedly attached to a severed head's nearby corpse.
Al Qaeda overtook an army base in southern Yemen Thursday, and the U.N. is expressing concern.
The latest Boko Haram attack, carried out by a female, reportedly killed at least seven people in the city of Biu, in Borno state.
A number of Israeli citizens have reportedly joined the Islamic State, which has attracted roughly 20,000 foreign fighters.
Al Qaeda's Yemen franchise is seen as the group's most dangerous arm.
Obama sent a draft resolution Wednesday seeking legal authorization from Congress to use force against ISIS for three years.
The Nigerian military said it couldn't guarantee an election commissioner's safety unless the vote was held back for six weeks.
The news of Boko Haram deaths came as Niger officials declared a 15-day state of emergency in border city Diffa.
President Obama formally asked Congress on Wednesday for increased powers to fight ISIS. Lawmakers are split on ground troops.