The dispute has been over legislative reform that will bring an end to the closed shops operated by workers' stevedore companies at Spain's ports.
Terraferida says that the Costas Authority should not be giving permission for such events.
Emergency numbers from Spain: +44(0)7801 371 704 and +44 07712 764 151.
Among messages of solidarity and condolence have been ones from Palma town hall, the CCOO union, the hoteliers and Pep Guardiola. The Spanish government has issued its condemnation, and King Felipe has described the attack as "despicable".
The Balearic parliament yesterday condemned the import and called on the Guardia Civil to prevent the unloading.
Floodlighting has been installed to enable work to go on overnight.
The hotel industry will prosecute all fraudsters in line with Spanish law, which will mean all of those in the chain, including holidaymakers.
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