SOFIA, Mar 28 (Reuters) Bulgaria will punish the head of its military operations in Iraq, the Defence Ministry said today, but declined to say whether it was linked to the killing of a Bulgarian soldier by U.S. troops earlier this month. The NATO newcomer has blamed U.S. forces for accidentally killing junior sergeant Gurdi Gurdev on March 4 when they fired on his patrol in southern Iraq, but it has also said poor communications with its allies played a role. Colonel Geno Chepilski, Bulgaria's senior representative in Iraq was responsible for coordinating with U.S. troops, but Defence Minister Nikolai Svinarov...