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A separate bomb erupted at a second postal-sorting centre in Kerkrade in the south of the country. Police in Amsterdam said: “On Wednesday morning, an explosion took place in a mailroom of a business building on the Bolstoen just before 8 am, presumably caused by a bomb letter. No injured.” Their colleagues in Limburg said: “A letter package exploded at a postal sorting company on Wiebachstraat in Kerkrade around 8:30 am. No one was hurt.

Mail bombs have exploded in Amsterdam and Kerkrade, Netherlands, this morning

The explosions took place in a mailroom in Amsterdam

“The company has been evacuated and Team Explosives Exploration is on site to conduct investigations. “It is still unknown whether there is a connection with the explosion of a letter package this morning in Amsterdam.” In late December and early January several mail bombs were sent to businesses in Amsterdam, Rotterdam, Utrecht and Maastricht. SEE MORE: Storm Ciara: Flights at Gatwick & Heathrow cancelled & delayed - is your flight affected?

The letter bomb that was sent to Rotterdam earlier this year