Forensic teams have identified the bodies of more than half the 154 victims of last week's plane crash in Madrid, but some may never be identified because of problems in obtaining DNA from relatives, AP quoted the Spanish interior minister as saying Monday. So far, 90 sets of remains have been identified, Alfredo Perez Rubalcaba told reporters after he made a hospital visit to two of the 18 people who survived the disaster. «We are working day and night,» the minister said earlier in an interview with Cadena Ser radio, predicting that most of the remaining bodies will identified in a matter of days. Many of the bodies of victims of Wednesday's crash of a Spanair MD-82 bound for the Canary Islands were burned beyond recognition, and forensic teams are using DNA techniques to identify them.