One child has died and another is missing after the two 10-year-olds went into a rain-swollen New Jersey river. The mayor of Passaic says the 11-year-old sister of a 10-year-old boy had also gone into the water but was possibly saved by her brother before he drowned. The missing child, a 10-year-old girl, had not been located as of Thursday morning. The fire department chief referred to the search as a “recovery operation.” The trio had been seen in the Passaic River in Pulaski Park on Wednesday evening. The river was higher than usual due to heavy rainfall. A man in the park attempted a rescue but couldn't reach the children.