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Conventional nuclear fusion occurs in plasma at temperatures greater than 107℃ or when energy higher than 10keV is applied. We report a new result of anomalous neutron emission,also called cascade neutron burst emission,from deuterium-loaded titanium and uranium deuteride samples at room temperature.The number of neutrons in the large bursts is measured as up to 2800 in less than a 64-μs interval.We suggest that the anomalous cascade neutron bursts are correlated with deuterium-loaded metals and probably the result of nuclear reactions occurring in the samples.