Five people are being questioned by the FBI in connection with the bomb attack in New York that left 29 people injured.
Authorities say FBI agents pulled over a car on a road in Brooklyn and are questioning the vehicle's occupants as part of the investigation into Saturday's bombing.
Meanwhile, investigators are examining a suspicious device found in a bin near a New Jersey train station.
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A review of operations of the Oberstown children detention campus has been announced this morning.
The report, which will be carried out by two international experts, comes in the wake of a series of disturbances at the facility in Dublin.
The Department of Children said it will examine "the progress of the campus towards and capacity to deliver the highest standards of care to the young people detained there".
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Islamic State has claimed responsibility for an attack in a Minnesota shopping centre in which eight people were stabbed.
The caliphate-linked news agency, Amaq, has released a statement insisting the attacker, who was wearing a security guard's uniform, was a "soldier of the Islamic State".
Speaking shortly after Saturday evening's attack at the Crossroads Center in St Cloud, police chief Blair Anderson said the attacker had "made some references to Allah".
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World leaders will try to come up with a plan for an international response to the global refugee crisis at a special United Nations summit later.
The UN estimates 57,000 migrants are now trapped in Greece in 47 camps - unable to continue their journeys because Europe has closed its borders.
Minister for Justice Frances Fitzgerald will represent Ireland at the gathering, which all 193 member states are attending.
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Game of Thrones has broken the record for the most wins in Emmy history after bagging three overnight - including best drama series.
The fantasy show has overtaken comedy Frasier to become the most successful series ever.
At the ceremony in LA, Dame Maggie Smith was named best supporting actress in a drama series, while Sherlock clinched the prize for outstanding television movie.
