The Royal Netherlands Marechaussee says they are still investigating the aircraft at Amsterdam Schiphol Airport.
The two explosions took place in Amsterdam and Kerkrade and no one was injured, police said.
Authorities in the German city of Dortmund moved around 14,000 people from homes and buildings due to four suspected unexploded WW2 bombs
15 people were killed and more than 50 others wounded when a suicide bomber detonated a device on a subway train in April 2017.
Uncertainty over Stormont and Brexit is hampering the fight against terrorism in Northern Ireland, a police chief said after a bomb in Fermanagh.
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.
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.