TORONTO - The Tragically Hip are adding four more dates to their summer tour.

The seminal Canadian band, which announced last week that lead singer Gord Downie is facing incurable brain cancer, will play the new shows in cities where they already have scheduled concerts.

The additional dates will be in Vancouver (July 26), Edmonton (July 30), Calgary (Aug. 3) and Toronto (Aug. 14).

Promoters say the extra dates were added "due to overwhelming demand."

A batch of pre-sale tickets went on sale to the band's fan club members on Monday morning and sold out within minutes.

Tickets go on sale to the public on Friday through Ticketmaster and its partners.