Officials said a suicide car bomb exploded and assailants attacked security forces and stormed the prison in Jalalabad, the capital of Nangarhar province.
Safiyya Shaikh, 36, was planning on planting a bomb at the famed London cathedral as she prepared her pledge of allegiance to the so-called Islamic State group.
The mother of an ISIS recruit has told Euronews she believes her son is still alive - three years since reports he was killed in Syria.
Twitter, Google, Instagram and Telegram were involved in the operation, Europol said.
An appeals court has ruled the Netherlands is not required to repatriate the children born into families of its fighters that left to join the Islamic State.
Denmark has already announced plans to strip dual nationals of their citizenship if they have travelled abroad to fight with militant groups.
The industrial giant is still accused of financing terror groups including IS as it tried to keep its Syrian plant open amid the conflict.
The jihadist organisation confirmed that their leader Abu Bakr al-Baghdadi and chief spokesman had died after the US announced the deaths earlier this week.