The Spanish police assume that the letter bombs originated in the city of Valladolid

©Reuters. A Spanish Civil Guard vehicle enters Torrejon de Ardoz air base after suspected explosive devices hidden in envelopes were sent to the base, followed by other packages being sent to targets linked to Spanish support to Ukraine in the midst of Russia

MADRID (Reuters) – Spanish police said six letter bombs sent to high-profile targets in recent days appeared to have been posted from the northern city of Valladolid, a source close to the probe told Reuters on Saturday.

The devices were sent between November 24 and December 2 to destinations including Prime Minister Pedro Sanchez, the Embassy of Ukraine in Madrid, government offices, a European Union satellite company and the US Embassy.

Most were defused, although an employee at the Ukrainian embassy was slightly injured when one of the devices ignited.

No person has been identified as the sender of the packages, said the source, who asked not to be named to discuss the investigation.