With international navies busy in thwarting Houthi attacks on Red Sea shipping, pirates from Somalia are attempting a comeback. More than 20 attempted hijackings since November off the coast of Somalia have driven up prices for armed security guards and insurance coverage.The raids are piling risks and costs onto shipping companies also contending with repeated strikes by Yemen’s Houthi militia.Bangladeshi bulk career, Abdullah, became the latest victim of a resurgence of piracy that international navies thought they had brought under control. Over the weekend, the Indian Navy intercepted and freed the Ruen, which was sailing under Malta’s flag, after it ventured back out to sea. The European Union’s anti-piracy mission, EUNAVFOR Atalanta, said the pirates may have used the ship as a launchpad to attack the Abdullah.