Tickets to attend a speech by former U.S. president Barack Obama in Montreal next month sold out within a half-hour on Saturday.

Obama will speak at the Palais des congrès convention centre at 5 p.m. on June 6. He will be delivering a keynote speech to the Montreal Chamber of Commerce as part of a series of talks by international leaders.

Advance tickets were sold to members of the Chamber of Commerce. Members of the public had the chance to buy tickets online today at noon.

By 12:35 visitors to the website were informed the event had been sold out. Prices ranged from $57 to $373.