The State Investigation and Protection Agency (SIPA) confirmed that it had received official advice from the USA concerning the arrests last week.
The official advice notes that money intended to support Islamic State arrived in BiH to finance youths from that country going to fight in Syria.
"In accordance with its powers, SIPA has undertaken appropriate steps which, in the interest of the investigation, we cannot disclose," SIPA spokeswoman Kristina Jozic said.
The Federal Bureau of Investigation (FBI) last week arrested six Bosnian nationals and charged them with sending money and weapons to Islamic State.
The suspects have been identified as Ramiz Zijad Hodzic (40), his wife Sedina Unkic Hodzic (35) and Armin Harcevic (37). All three are American citizens. The others arrested are Nihad Rosic (26), Mediha Salkicevic (34) and Jasminka Ramic (42), who lived in the USA with legal or refugee status in the country.
The suspects allegedly sent weapons, military uniforms, money and combat equipment to a man named Ramo Pazara, born in Teslic, northern Bosnia who was killed in Syria in 2014. Pazara is suspected of having recruited hundreds of youths from BiH to fight in Syria and Iraq, the Nezavisne Novine newspaper has reported.
Pazara is not the only one suspected of these dealings. An informal radical Islamist leader in BiH, Bilal Bosnic, has been indicted on suspicion that on several occasions he received 175,000 dollars to finance terrorist activities. Bosnic, however, received that money from Arab countries and it is not clear whether he was linked directly with Pazara.
The large Bosnian community in the USA has been shocked with the arrests and Dnevni Avaz carries a special statement by the chief Islamic religious leader in northern America, Sabahudin Ceman, who expressed his "shock" with the news of the arrests.
"We strongly condemn any activity that promotes extremism and terrorism of any kind," Ceman said, expressing full support to the American judicial bodies to investigate and charge all those who violate the law.
Ceman underscored that his community is taught "authentic Islamic values contained in loyalty to Islam and respect of state laws."