NEW : 2.5 million people killed in floods said Information Minister Zahir Ali Shah . U.N. says Up to 1,500 people in northwestern Peshawar affected . CNN 's Reza Sayah , Nazneen Akbari and Matiullah Mati contributed to this report . Officials fear an outbreak of gastro conditions due to lack of drinking water . Destroyed bridges , roads hampering rescue efforts in flood-hit areas .
NEW : 2.5 million people killed in floods said Information Minister Zahir Ali Shah . U.N. says Up to 1,500 people in northwestern Peshawar affected . Officials fear an outbreak of gastro conditions due to lack of drinking water . Destroyed bridges , roads hampering rescue efforts in flood-hit areas .