Police said the weapon trafficking network was terrifying in its size and capability – which now includes anti-aircraft weaponry.
The country’s Interior Minister said “several anti-aircraft guns capable of bringing down aircraft” were seized on Thursday, along with thousands of rifles.
The entire arsenal was worth nearly £9 million. Police also seized more than £70,000 in cash.
“For this, they had a sophisticated and complete workshop for the repair and in its case reactivation of the firearms.”
Police have seized 12,000 weapons in an anti-terror seizure
Police said the group were made up of four men and one woman, all of whom were Spanish. They were arrested in the north Spanish towns of Olot, Liendo, Galdacano and Guecho, where the workshop was discovered.
Police forces from Barcelona, Valencia and Santander were also involved in the operation.
Police also discovered £70,000 in cash used by the criminal gang
Police said some of the weapons were capable of “bringing down aircraft”
The five suspects legally bought unused weapons of war, repaired them before selling them on to terror cells or organised crime groups.
This particular operation was set up in the wake of a terror attack at a Jewish museum in Brussels in May 2014.