Between mid-July and mid-September, Spanish police monitoring travel across the Strait of Gibraltar detected 46 individuals suspected of being returning jihadists, according to a European Commission report. Part of a border control effort dubbed Operation Minerva, the 46 anti-jihadist alerts did not result in any arrests as there were no existing warrants against the suspects.

As part of Operation Minerva, officers from the National Police and Civil Guard were deployed at Spain’s busy seaports of Algeciras, Tarifa and Ceuta, a Spanish exclave city located on the northern coast of Africa. Law enforcement experts from 16 other EU states and observers from the United States were also present.

Read more: El Pais (Spain)