Dutch police are investigating after suspected letter bombs exploded in two separate offices in the Netherlands.
The first explosion occurred at around 8am local time (7am GMT) in the mail room of a company in northwestern Amsterdam.
The second was reported at a postal company just minutes later in the city of Kerkrade, 120 miles to the south.
No one was injured in either of the blasts, Amsterdam and Limburg police said on Twitter.
A suspicious item was first reported to police in Kerjrade at 8.33am, with the blast following at 8.54am.
Limburg police said: "It is as yet unknown whether there is a connection with the explosion of a letter package this morning in Amsterdam."
It comes weeks after a series of mail bombs were sent to seven businesses in Amsterdam, Rotterdam, Utrecht and Maastrichtm accompanied by threatening letters, the Netherlands Times reported.
The bombs were made to look like they were sent by central collections agency CIB.
Because some companies did not realise the letters were not from the CIB, they mistakenly sent the mail bombs back to the agency.
One mail bomb reached the CIB, another was intercepted at a mail sorting center in Rotterdam.
None of the previously sent mail bombs exploded.
