KARACHI (Reuters) - The foreign exchange reserves remained unchanged at $16.07 billion for the week ending on Sept. 10, the SBP said on Thursday, holding steady from the previous week. Reserves held by the State Bank of Pakistan (SBP) fell to $12.34 billion from $12.35 billion, while those held by commercial banks rose to $3.73 billion from $3.72 billion, said Syed Wasimuddin, chief spokesman of the SBP. 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.