Saudi Arabia may have used “double-tap” airstrikes in Yemen, a tactic that sharply increases the number of civilian casualties and endangers rescuers who rush to help the victims of the first air raid, a new report has warned, after Riyadh’s latest attack on a Yemeni prison claimed more than 100 lives. The report by Bellingcat, an investigative journalism site, is to be released on Monday. The tactic sees missiles fired ...