The Bush administration took action Tuesday to freeze financial accounts and assets of a naturalized British citizen for allegedly providing "material and logistical" support to al-Qaida and other terror groups. The action against Mohammed Al Ghabra means that any bank accounts or other financial assets belonging to him found in the United States must be frozen. Americans also are prohibited from doing business with him. The Treasury Department alleged that Al Ghabra had organized travel to Pakistan for people seeking to meet with senior al-Qaida officials and to undertake jihad training. Several of those people returned to the United Kingdom to engage in covert activity on behalf of al-Qaida, the department said.