Waterloo regional police say a 30-year-old Kitchener woman and a 6-year-old boy from Guelph suffered life-threatening injuries when they were hit by a GO train Wednesday afternoon at Lancaster Street W. and Victoria Street N. in Kitchener.

Police say they were attempting to walk across the tracks when they were struck by a westbound train.

The two know one another but are not related, according to police.

Both were airlifted by Ornge ambulance to hospitals in Hamilton where they remain in hospital.

Ornge ambulance spokesperson Joshua McNamara told CBC Wednesday a female patient in her 30's was being transported to Hamilton General Hospital with life threatening injuries, and a pediatric patient was being sent to McMaster University Medical Centre.

We have received a report of a possible fatality just east of Kitchener <a href="https://twitter.com/hashtag/GOtrain?src=hash&ref_src=twsrc%5Etfw">#GOtrain</a> station and the and the area is now in the hands of emergency personnel and investigators. The Union Station 12:53 - Kitchener GO 14:47 train will need to hold until further notice. —@GOtransitKT Today is a difficult day. Our primary concern is the condition of the people injured at the crossing in Kitchener & our thoughts are with them. We are also thinking about our staff who are on site & our customers on board the train. —@AMAwithAMA

Shortly before 3 p.m.

Metrolinx officials said they were notified just before 3 p.m. that two people were hit by a GO train coming from Guelph.

A GO train twitter account noted a "possible fatality just east of Kitchener #GOtrain station."

Waterloo Regional Police Service closed the level crossing on Lancaster Street West at Victoria Street North. Motorists were asked to avoid the area if possible.

Waterloo Regional Police investigate Wednesday afternoon after pedestrians were hit by a GO Train. (Carmen Groleau/CBC)

The scheduled 2:57 p.m. Go train from Kitchener scheduled to arrive in Toronto at 4:47 p.m. was cancelled.

As of Wednesday evening, trains were again moving through the area.

"Trains are now allowed to proceed through the area of the police investigation and on to Kitchener GO. Thank you again for your patience and understanding," GO Transit's website said.