Two BART trains struck a large tree branch, causing major delays during the rush hour commute and frustrating thousands of stranded passengers Tuesday evening.

BART spokeswoman Alicia Trost says the trains hit the branch outside Balboa Park station. One was coming into the station and the other leaving. No injuries were reported.

She says crews have to move the trains and branch to inspect the tracks for any damage.

Video and images surfaced on Twitter of a large crowd of commuters desperately trying to leave the 24th Street Mission station.