President Barack Obama says the U.S. and Britain will do everything in their power to help France seek justice for last week's terror attacks.

Obama spoke at a news conference Friday with British Prime Minister David Cameron.

Obama says they spent much of their time in two days of meetings talking about the fight against terrorism after the attacks in Paris that killed 17 people. He called the attacks ``vicious'' and said both nations stand with the French and all allies fighting the ``scourge'' of terrorism.

Fears of further attacks by Islamic extremists are growing, with police in Belgium saying they killed two suspects in a raid Thursday to stop another major impending attack.

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