Flocks of dead birds fell down on roofs and gardens of houses in Arkansas.

Such phenomena were also witnessed in Louisiana, Pennsylvania and California.

Meanwhile, shoals of dead fishes have increased public doubt and worry.

Some 100,000 dead fishes were found in an Arkansas river and, a week later, two million dead fishes in the sea off Maryland.

Upset by the phenomena, local people feel suspicion that they are of bad omen.