Police officers stand guard as other officers in yellow vests walk back at the cordoned off area next to the Ukrainian embassy in Madrid, Spain, Wednesday. Spain’s Interior Ministry says police are investigating reports of a blast at the Ukrainian embassy in Madrid. The ministry says police were told an employee at the embassy was slightly injured handling a letter in what it described as “a deflagration.” (AP photo)

MADRID — Police in Spain detonated a suspicious parcel discovered at the U.S. Embassy in Madrid, Spanish officials said Thursday, a day after a similar package sent to the Ukrainian Embassy ignited upon opening and injured an employee.

“We can confirm a suspicious package was received at the U.S. Embassy in Madrid, and are aware of reports of other packages sent to other locations throughout Spain,” the American embassy said in a response to an Associated Press inquiry.

“We are grateful to Spanish law enforcement for their assistance with this matter,” it added.

Spain’s police said the detonated parcel “contained substances similar to those used in pyrotechnics.”

The action followed police reporting that multiple explosive parcels were sent in Spain over the past two days. Police said they were delivered to Spain’s Defense Ministry, a European Union satellite center located at the Torrejon de Ardoz air base outside Madrid and to an arms factory in northeastern Spain that makes grenades sent to Ukraine.