The US embassy in Spain received a letter bomb after Spanish prime minister and others were targeted, report says

• The US embassy in Spain received a letter bomb on Thursday, Spain's La Sexta reported.
• The bomb was detected and detonated, the report said.

The US embassy in Spain has been sent a suspected letter bomb, according to local reports.

Spain's La Sexta TV station reported on Thursday that the embassy had received an incendiary device similar to the ones that were sent to the other targets over the past week.

Sources told the outlet that the letter arrived on Thursday, and was detected and detonated.

"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 told the Associated Press.

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

This latest development comes after Spain's interior ministry said on Thursday that letter bombs had targeted the country's prime minister, the Ukrainian embassy in Madrid, an air base, and a military equipment company that supplies rocket launchers to Ukraine.

The one sent to the Ukrainian embassy exploded on Wednesday, injuring an embassy worker.

Spain's Secretary of State for Security also said that an envelope was detonated by security at the Ministry of Defense headquarters on Thursday, which was addressed to the defense minister, according to Spanish newspaper El Pais.

The interior ministry said that investigations were underway.

This is a developing story. Please check back for updates.