Services have returned to two of Melbourne’s suburban rail lines after people were hit by trains in separate incidents.

Trains resumed on the Pakenham line between Dandenong and Berwick at 3pm after a person was hit by a train shortly before midday.

Operator Metro tweeted that "there may be delays to 5 min as we recover from the incident."

On the Werribee and Williamstown lines, services are returning to normal – although with 10-minute delays – after a woman was killed by a train between Yarraville and Seddon stations around 11am. The incident is not being treated as suspicious.

There are also delays of 10 minutes on the Sandringham line after ambulance staff attended to an ill passenger at South Yarra just after 2pm.