North Korea's Red Cross has rejected an offer from its South Korean counterpart for aid to flood victims, a South Korean official said Wednesday, as an aid group claimed the disaster left about 10,000 people dead or missing. North Korea "expressed thanks for Seoul's offer" but said "it will handle the recovery efforts from recent floods by itself," a senior North Korean Red Cross official said, according to the South Korean Red Cross. Floods caused by heavy rains in mid-July killed at least 154 North Koreans and left another 127 or more missing, according to the United Nations. North Korea's official media has said the disaster caused hundreds of casualties and cut off roads, bridges, railroads and communications. However, the Seoul-based Good Friends group, an aid organization for North Korean refugees, said in a statement Wednesday about 10,000 people were dead or missing and some 1.5 million people were left homeless from the floods, according to a report of CNN.