Hollande calls for constitutional change to combat terrorism

Our live blog is tracking the latest updates as France launches air strikes against ISIS after deadly attacks in Paris killed 129 people on Friday.

The French Interior Minister told reporters that 23 people have now been arrested as part of anti-terror raids launched across the country. A further 104 have reportedly been placed under house arrest.

President Barack Obama said that the attacks in Paris were "terrible" and "sickening" setback in the fight against ISIS, but that progress is being made.

Meanwhile French President Francois Hollande has called for the country's state of emergency to last three months. He said that a constitutional change was necessary in order for crises to be dealt with better.

In the U.S., several governors have announced their opposition to relocating Syrian refugees within their states' borders.

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