KUNMING, July 23 (Xinhua) -- Security authorities here have tripled the reward to 300,000 yuan (about 43,500 U.S. dollars) for information that can help solve the two fatal cases of bus blasts on Monday.

    The change was announced online by the Public Security Department of Kunming City on Wednesday.

    The explosions occurred on two Route 54 buses during the morning rush hour in Kunming, the Yunnan provincial capital, leaving two dead and 14 injured.

    One blast occurred at Panjiawan Bus Stop on West Renmin Road at7:10 a.m., while the other took place at the intersection of Changyuan Road and West Renmin Road at 8:05 a.m. on a bus that was about to reach its final destination at Minshan in Kunming.

    In the new document, the police asked citizens, especially passengers who took Route 54 buses between 6:00 and 8:30 a.m. on Monday, to provide clues.