Police in Dallas are investigating an incident at a football game over the weekend where a gunman opened fire on a crowd of spectators injuring five people including a pregnant woman.

According to KWTX News 10, and CBS Dallas KTVT and a man drove a moped onto a football field Sunday evening and opened fire on spectators while a game was being played injuring 5 people, 2 women are in critical condition and another woman and two men are in stable condition.

Police on Monday said that several people in the crowd returned fire at the unidentified suspect but its unknown if the suspect is among the injured. Police have not released a motive.