ISIS mission: Rob Nicholson addresses coalition ambassadors

A day after Prime Minister Stephen Harper announced his intention to "expand and extend" Canada's ongoing military mission in Iraq, Foreign Affairs Minister Rob Nicholson held a last-minute noon-hour briefing for ambassadors from other countries involved in the battle against ISIS.

• Iraq mission extensionmotion to go to House next week
• Extending ISIS missioncould signal year-long commitment
• Sgt. Andrew Doiron was killed as Peshmerga troops waited for ISIS ambush, Kurd says

On Wednesday, the prime minister said he plans to put forward a motion in the House of Commons next week to extend Canada's mission beyond the current deadline, which expires in early April.

Ambassadors were notified of the briefing on Wednesday evening after officehours. A news release regarding the speech was sent at 7 a.m. ET.

In his remarks on ISIS, Nicholson warned ambassadors that"left unchecked, this terrorist threat can only grow and grow quickly."

He didn't take any questions following the speech.