( CNN ) -- Twenty-eight suspected pirates were taken into custody Friday by the European Union Naval Force after a handful of failed attacks on fishing vessels in the Indian Ocean , the EU mission said . In the first incident , the mission intercepted a mother ship and two skiffs early Friday in the southern Indian Ocean between the Seycelles and Mombasa , Kenya . The mission said the suspected pirates were in an area where an earlier attack had occurred . A helicopter from the French warship FS Nivose then tracked the vessels and saw the suspects throwing things overboard , the mission said . When a French team arrived at the scene , it found 11 suspected pirates and `` pirate paraphernalia '' in the skiffs : a rocket launcher , grappling hooks and several fuel barrels . The forces destroyed the pirate ship and a skiff and took the suspected pirates into custody . The fate of the second skiff was not immediately known . Soon after , pirates tried to attack a French fishing vessel near two other fishing boats , said Cmdr . John Harbour , spokesman for the EU Naval Force . The French fishing vessel collided with the suspected pirates ' vessel and sank it , Harbour said . Six suspected pirates were picked out of the water by the EU force , he said . It was not immediately clear if they had been transported to the FS Nivose , although that had been planned , he said . Later , pirates tried to attack a Spanish fishing vessel , Harbour said . The boat alerted the EU Naval Force , and air and naval units intervened , he said . Eleven suspected pirates were taken into custody and were on board the Nivose , Harbour said . Harbour said an increase in pirate attacks was likely over the next few weeks as the monsoon season was ending and the ocean was becoming calmer , he said . `` The pirates have been preparing for it . ... We are prepared as well , '' he said . On Thursday , pirates on two skiffs in the Indian Ocean attacked the Spanish fishing vessel Albacan , the EU Naval Force said . The pirates fired a rocket-propelled grenade , which exploded on the Albacan 's deck and burst into flames , force said . Armed guards on the Albacan fired shots at the skiffs and repelled the attack , it said . No crew members were injured , and the small fire was extinguished . The EU mission tries to deter and stop piracy off Somalia , which has been mired in chaos since the early 1990s . It escorts vessels in the Gulf of Aden and Indian Ocean carrying World Food Program humanitarian aid to displaced people in Somalia . It also seeks to protect `` vulnerable vessels '' in the Gulf of Aden and off the Somali coast , according to the mission 's Web site .
Pirates attack fishing vessels in Indian Ocean . Some suspected pirates and ` ` pirate paraphernalia '' captured by Somali naval force . EU mission involved in trying to deter , stop piracy off Somalia . EU spokesman : The pirates have been defeated . We are prepared as well .