BRUSSELS (AFP) - Nine people picked up by Belgian police in two separate swoops against a Chechnya-linked extremist network and a group recruiting Afghan fighters were thrown behind bars on terror charges Wednesday. In dawn swoops Tuesday, police rounded up 11 people in three countries - Belgium, Germany and the Netherlands - suspected of plotting an attack in Belgium, which hosts NATO and the European Union. Judicial authorities also announced the detention in Brussels the same day of 15 people accused of recruiting volunteers to fight in Afghanistan and Iraq. The seven people detained in Antwerp and two of the 15 detained in Brussels were placed under arrest for participating in a terrorist group, a spokeswoman for the Belgian prosecutors office, Leen Nuyts, told AFP. A Chechen and six Belgian-Moroccans were detained in the northern Belgian port city of Antwerp, home to large Jewish and Muslim communities. Three Dutch people of Moroccan origin were detained in Amsterdam and German police arrested one of Chechen origin in Aachen. Those 11 suspects, picked up after an international inquiry started in 2009, were suspected both of plotting an attack in Belgium and of recruiting candidates and funds for the Caucasus Emirate, a Chechen rebel group. The spokeswoman confirmed Wednesday that their exact target (in Belgium) had not been determined on their arrest. No extra security measures have been enforced in Belgium, a spokesman for the governments crisis centre said. Extradition proceedings have been launched to transfer to Belgium the suspects detained in the Netherlands and Germany, Nuyts said. However the three Dutch suspects opposed their extradition when they appeared in court in Amsterdam Wednesday, prosecution spokeswoman Ruth Gorissen said. The court has three months to issue a ruling on the three men aged 25, 26 and 28, she said. However Robbert Jonk, the lawyer for one of the three, said his client was against fast track extradition and had opted for the longer procedure on his advice. Of the 15 others detained in Brussels the same day in an unrelated probe over the recruitment of volunteers to join the battles in Afghanistan and Iraq, 13 were released. Police searches in homes across Brussels in the pre-dawn swoop aimed at dismantling a group with terrorist characteristics.