WASHINGTON (AP) _ The National Transportation Safety Board will conduct a two-day investigative hearing into an electrical malfunction that filled a Metro tunnel with smoke in January, killing one person and injuring dozens.

The hearing will conducted June 23 and 24 at the NTSB’s Board Room and Conference Center in Washington.

On Jan. 12, a Virginia-bound train stalled in a tunnel near the busy L’Enfant Plaza station during early afternoon rush hour. But instead of pushing smoke out of the subway tunnel, ventilators pulled it toward the train.

Passengers were trapped for about 30 minutes while they waited for emergency responders to arrive.

Carol Glover, 61, of Alexandria, Virginia, was killed.