BAKU Azerbaijani and U.S. officials believe a Russian surface-to-air missile caused the deadly crash of an Azerbaijani passenger jet, media reports and a U.S. official said Thursday, as the Kremlin cautioned against "hypotheses" over the disaster. The Azerbaijan Airlines jet crashed near the Kazakh city of Aktau, an oil and gas hub, on Wednesday after going off course for undetermined reasons. Thirty-eight of the 67 people on board died. The Embraer 190 aircraft was supposed to fly northwest