KARACHI (Reuters) - Pakistans foreign exchange reserves fell to $16.29 billion in the week ending on Aug. 13, from $16.46 billion the previous week ago, the SBP said on Thursday. Reserves held by the State Bank of Pakistan (SBP) fell to $12.46 billion from $12.65 billion a week earlier, while those held by commercial banks rose to $3.83 billion from $3.81 billion, said Syed Wasimuddin, the SBPs chief spokesman. Pakistans forex reserves rose to a record high of $16.77 billion in the week ending on July 2 thanks to foreign inflows worth $750 million received that week. The previous record high was $16.45 billion in October 2007. In May, Pakistan received $1.13 billion, the fifth tranche of a $11.3 billion International Monetary Fund (IMF) loan. Pakistan and IMF officials are due to meet from Aug. 23 to Sept. 2 to discuss the approval of a sixth tranche. The IMF loan package was agreed to in November 2008 to help avert a balance-of-payments crisis and shore up reserves.