The series of mailed pipe bombs, which prosecutors described in court papers as "a domestic terror attack," spurred a nationwide scare last year.
At least four people were injured by the small explosions which took place shortly before 9am local time on Friday.
16,000 people were evacuated from an area of Frankfurt to allow for an unexploded WWII bomb to be defused.
Mustafa Mousab Alowemer, 21, recorded a video of himself pledging an oath of allegiance to the leader of ISIS, court documents say.
A fishing vessel reported catching the two-metre-long wartime sea mine in its nets on Saturday.
It created a massive underwater blast when the police defused it.
Police believe the package found at the Dock Road sorting office is the fifth device sent by dissident republicans.
Explosive devices found in two London airports and Waterloo station prompt counter terror probe
The grenade was discovered in a shipment of French potatoes imported to a Hong Kong crisp factory, and detonated by police.
Police say a court in Potsdam has been evacuated due to bomb threats.
A departure hall at Amsterdam's Schiphol airport was briefly evacuated on Monday evening after a man claimed to have an explosive.
Tourists continued to visit Egypt's pyramids just 24 hours after a deadly bomb attack
On the 30th anniversary of the Lockerbie bombing, those affected by the disaster take to social media to share their stories.
Lockerbie bombing: “What really brought it home was when you were picking up toys.” On the 30th anniversary of the Lockerbie disaster, Euronews interviews a police officer drafted in to help with the aftermath and subsequent investigation.
Take a look at our round-up of key stories from around Europe so far today.
Devices believed to contain explosive materials were sent to prominent Democrats and CNN, is this the after effect of Trump's rhetoric?
Elena González never expected that a recent sort through of stock at her second-hand bookstore in western Spain would lead to a call to bomb disposal experts.
Wireless signals can penetrate bags to get the dimensions of dangerous metal objects, including weapons and batteries for bombs, as well as estimate the volume of liquids such as chemicals for explosives.
One year after the fall of ISIS Mosul is still a city in ruins, where an estimated 8 million tons of remnants of war partially buried under the debris."
Residents were moved from their homes as authorities in the Hungarian capital dealt with an unexploded World War Two bomb