The Israel Defense Force (IDF) confirmed Wednesday evening that naval commandos have seized 7 of the 58 vessels participating in the international “Freedom Flotilla” from Barcelona heading to Gaza.

The operation took place hundreds of kilometers from Israeli shores, the furthest distance for such an interception to date.

While only 7 have been seized so far, the flotilla leaders say there is communication and navigation jamming on all boats. The IDF has effectively halted the lead ships’ advance toward the naval blockade.