@itvnews: River campaigners say hundreds of fish have suffocated after sudden heavy rainfall flushed contaminants into the water. Fry, carp, pike and eels are among the fish killed in the River Wensum, which runs through Norwich. The Environment Agency said the deaths were the result of low oxygen levels caused by a sudden downpour last week following an extended period of hot, dry weather. A spokesperson said: “Our investigation suggests the most likely cause was a burst of heavy rainfall last week that flushed contamination from drains into the river. This coincided with low river flows and high temperatures, significantly reducing the amount of oxygen in the water the fish need to survive.” The campaign group Wensum Riverkin said it would take years for the river to recover.