Zenica was a base for Islamic fighters during the civil war
Bosnian police have raided the offices of an Islamic charity believed to have links with extremist organisations, including the al-Qaeda terrorist network.
Police seized documents and questioned staff at the Benevolentia International Foundation in Sarajevo and in the central Bosnian town of Zenica.
The raid is part of ongoing efforts to clamp down on Islamic charities which may be channelling funds to al-Qaeda and other extremist organisations.
In January, six naturalised Bosnians were stripped of their citizenship and handed over to the American authorities. Most of them had been working for Islamic humanitarian organisations.
Islamic legacy
The American government has already blocked Benevolentia's assets. Reports by the Bosnian financial police showed that hundreds of thousands of dollars had been withdrawn from the charities' accounts, with no records to show where the money had gone.
There are dozens of Islamic charities in Bosnia - a legacy from the war, when the Islamic world supported the Muslim-dominated Bosnian government.
Earlier this month, the Bosnian government froze the assets of a Saudi backed charity, al-Haramain, and in October police raided the offices of the Saudi High Commission for Relief.
There, they found computer files of potential terrorist targets, street maps of Washington and plans for using crop-duster planes to spread pesticides.
The Saudi High Commission had employed one of the six naturalised Bosnians who were handed over to the US.
US officials say another of the men was Osama Bin Laden's chief lieutenant in Europe.
Security at the American embassy in Sarajevo has now been stepped up.