KARACHI: The US dollar strengthened against Pakistani rupee on Thursday and gained 17-paisa in its value in interbank. The US dollar was traded at Rs160.22 against Rs160.05 on last trading day (Wednesday), according to a tweet of State Bank of Pakistan (SBP). During the ongoing week, the US dollar has been slightly strengthened by 15-paisa against Pakistani rupee in the interbank. Meanwhile, according to another tweet of State Bank of Pakistan (SBP) on Thursday, the foreign reserves of the country have increased to $18.75 billion as of April 30. - TLTP