A man was struck by an L train Friday morning after he suffered a seizure on the platform and fell on the tracks, cops said.

The 31-year-old victim was waiting on the Manhattan-bound platform at the DeKalb Avenue station in Bushwick at about 9:30 a.m. when he collapsed and tumbled onto the tracks just as the train was approaching the station.

Emergency services worked to remove the man from under the train. They took him to NYC Health + Hospitals at Elmhurst, where he was in critical condition, cops said.

L trains were not running along most of the line until about 10:40 a.m.