Taiwan spy agency denies 'magnetic' attack

"The National Security Bureau has not owned the alleged technologies, nor have we used equipment to harass the alleged targeted person," the bureau said in a statement.

Lin Ruey-shiung, the running mate of independent candidate James Soong, surprised the public last week when he claimed to have been subjected to "electromagnetic wave" attacks by the bureau on September 20 outside his home and over the following three days.

"If I hadn't quickly moved out (of my home), I would have lost my mind," he told reporters.

Lin, an epidemiologist, was chosen by Soong as his running mate in a move seen as aimed at securing support from Taiwan's rich and influential medical circles.