The operator of a Washington subway train that stopped in a smoke-filled tunnel has told investigators he repeatedly asked for permission to return the train to the platform but was denied.

Train operator James Curley told the National Transportation Safety Board that people on the train were "yelling, screaming, kicking and banging on the glass doors" as he was repeatedly told to wait in the tunnel.

One woman died and more than 80 others were sickened after an electrical malfunction that caused the train to fill with smoke. A transcript of Curley's interview was released Tuesday as the NTSB opened an investigative hearing into the Jan. 12 disaster.

Curley said Metro's command center was unable to clear another train from the platform to allow him to return there.