"I will seek authorisation for the use of force from the American people's representatives in Congress," President Obama said.
He said Congressional leaders agreed to "schedule a debate and then a vote as soon as Congress comes back in session."
More top news
A woman has died and six others are critical after a pool party shooting rampage in San Diego, California, police said.
Common antibiotics may double the risk of miscarriage in early pregnancy, research has shown.
Outbreaks of rain are set to sweep across the country, getting heavy and thundery in places.