The US Embassy in Spain became the latest building to receive a letter bomb on Thursday, in a series of attacks that have been launched against high-profile targets in recent days.
“We can confirm that a suspicious package was received at the US Embassy in Madrid and are aware of reports of other packages being sent to other locations in Spain,” the US Embassy said. in a response to an Associated Press inquiry.
“We are grateful to Spanish law enforcement for their assistance in this case,” he added.
The first letter bomb was sent to the office of the Spanish Prime Minister. The interior minister said Prime Minister Pedro Sanchez received the device last week, but it wasn’t announced until Thursday.
Another device exploded on Wednesday – slightly injuring a security guard at the Ukrainian Embassy in Madrid.
So-called letter bombs are designed to create a sudden flame instead of an explosion – consisting of flammable powder and a trip wire.
The Spanish Defense Ministry, an arms manufacturer and an air base were also targeted.
The interior minister said he had tightened his security measures in public buildings and that postal delivery across the country would be carefully inspected.