SOFIA, Feb. 27 (Xinhuanet) -- A suspected blast occurred on board shortly before the crashed Macedonian presidential plane went lost from radar, a local Bulgarian radio reported Thursday.

    The report quoted Sasho Yordanovski, editor-in-chief of the Macedonian magazine Forum, as saying that there have been two versions of the cause of the tragic incident, which claimed the lives of the Macedonian president and other eight people.

    One version attributed the accident to bad weather conditions in the area early Thursday and the other suggested a technical failure of the 25-year-old aircraft.

    Both Bosnian and Macedonian police have reached the site of theplane crash in the Bosnian mountains, and are working to identify cause.

    Trajkovski, 47, died when his plane crashed in the mountainous terrain in the south of Bosnia and Herzegovina in thick fog, along with eight others aboard.

    Besides the president, the victims include his councilors DimkaIlkova-Boshkovic, Risto Blazhevski and Anita Lozanovska, foreign affairs official Mile Krastevski, two bodyguards Atse Bozhinovski and Borsi Velinov, and two pilots Marko Markovski and Branko Ivanovski.

    The Macedonian president had been on his way to a conference in the Bosnian town of Mostar.