Egypt's military has carried out dawn bombings of Islamic State targets in Libya, according to reports by state television.
Seven days of mourning were declared in Egypt after Islamic State militants released a video claiming to show the murder of 21 Egyptian Christians kidnapped in Libya.
The video has been condemned by governments around the world, while the Egyptian leadership vowed to respond to the "criminal killings".
Egypt has opened a new front in the war against so-called Islamic State, bombing targets on the doorstep of Europe. It launched two waves of airstrikes on the Islamist terrorists in Libya.
It follows the mass murder of 21 Egyptian Christians on the Libyan seafront, barely 200 miles from the frontier of Europe. The Egyptian government has called on the international community to intervene in Libya.
ITV News Africa correspondent John Ray reports:
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