7 March 2015
Last updated at 10:52
One of the youths thrown from the building in Alexandria was killed
The authorities in Egypt have carried out the first execution over the violence that followed the overthrow of President Mohammed Morsi in 2013.
Mahmoud Ramadam, a supporter of the deposed leader and convicted of murder, was hanged, the interior ministry says.
The charges related to an incident when youths were thrown from a building in the city of Alexandria.
Mass trials and a crackdown on Islamists and the Muslim Brotherhood followed Mr Morsi’s removal.
The violence in Alexandria’s Sidi Gaber district broke out in the days after the army deposed Mr Morsi on 3 July 2013, following mass protests against his rule.
The state news agency Mena reported that 18 people were killed in the clashes.
Footage of two youths being thrown from a roof in the Mediterranean city was widely broadcast in Egypt at the time. One of them died.