Canadian Forces Capt. Tom St. Denis says the army reservist died Monday at CFB Wainwright. The soldier, who was not identified, was involved in Exercise Maple Guardian, a manoeuvre to help troops get ready for deployment to Afghanistan this summer.

St. Denis won't say how the U.S. soldier died, what unit he was from or where he was based.

St. Denis says the U.S. military does not release statements on soldiers who die until 24 hours after their next of kin are notified.

U.S. army reserve officials were not immediately available for comment.