ODENTON, Md. (WJZ) — The MARC Penn Line service was suspended Thursday morning after train 413 struck a woman walking on the tracks in Odenton, according to officials. The accident happened around 7:28 a.m.

Officials believe the woman is in her 20s. She was transferred by a Maryland State Police helicopter to Shock Trauma with critical, possibly life-threatening injuries.

READ MORE: Baltimore Department Of Transportation Announces Weekend Parking Enforcement, Road Closures

Trains 517 and 415 are being reversed back to BWI, while trains 419 and all subsequent trains will be held in Baltimore.

READ MORE: Royal Farms Arena Holding Job Fair For Security Guards On July 31

Service resumed around 9:45 a.m. however there are residual delays due to train traffic congestion.