A gang of robbers by distraction that robbed elderly people who made bank withdrawals in the regions of Valencia and Murcia has been arrested by the Civil Guard.
Operation Mugger was launched after a victim was mugged outside a bank in Batera.
Up to two gang members intensified bank surveillance on pension collection days to identify possible robbery targets.
Headphones and clothing-concealed communication equipment were used to relay details about a potential victim for other crew members to approach.
The elderly bank user would be distracted by someone looking for information while a colleague snatched the money from him.
The criminals operated in the province of Valencia in Buñol, Betera, Riola and the city of Valencia, as well as Burriana in the province of Castellón, and further south in San Pedro del Pinatar and Yecla in the Region of Murcia.
Two Colombian citizens have been detained and arrest warrants have been issued for two others.
They moved around Spain using fake Colombian identity documents, making it difficult for the police to identify and locate them.
The robbers became unstuck when they entered a bank in Betera and were seen behaving suspiciously on live security video being monitored by a Betera Local Police officer.
He saw them wearing caps to make identification difficult, and saw them communicating through headphones before a possible new robbery.
The Civil Guard was alerted when the men were leaving the bank and walking towards the metro, removing their caps, glasses and masks on the way.
Officers were able to intercept and arrest them.
The number of robberies and the total amount of money stolen have not been disclosed.