ROME (Reuters) – Italian defence group Leonardo’s plan to find a buyer for its OTO Melara and Wass units has been put on hold amid the crisis caused by Russia’s invasion of Ukraine, three sources close to the matter said. Leonardo said in December it had received two expressions of interest in OTO Melara, which produces naval and terrestrial cannons, and Wass, which makes torpedoes, and was waiting for binding offers. Leonardo said at the time it wanted to focus on helicopters, aircraft and electronics for defence, adding OTO Melara and Wass could have better growth opportunities outside the g…