At least one person killed and another was severely injured in a stabbing in southern Spain`s Algeciras by a man on Wednesday.
Locals reported at least four people were wounded.
Police said the suspect was arrested.
Spain`s National Court said a judge was investigating the stabbing as a possible terror attack.
Police said, a man entered the church and attacked the priest, leaving him seriously wounded."
"Subsequently, he entered the church of Nuestra Senora de La Palma in which, after causing damages, he attacked the verger. The verger managed to get out of the church but was caught by the attacker outside and sustained mortal injuries," the statement added.
The two churches are around 300 meters (1,000 feet) apart.