Increasing diesel prices while giving 'relief' on petrol prices is such a joke. In the international market, price of petroleum has decreased from $147/barrel to $99/barrel. That is a decrease of about 30%. But the Pakistani government has given relief of just Rs 5 on petrol, roughly 5%, and actually increased the price of diesel. The prices should have been decreased by at least Rs 25. -SUMBUL HAIDER, Karachi, via e-mail, September 28.