Pirates fired on a cargo ship around 110 nautical miles off the coast of Nigeria on Monday killing the captain and chief engineer, the International Maritime Bureau said Monday. \"Armed pirates chased and fired upon a drifting bulk carrier. Vessel raised alarm and headed towards Lagos. All crew except the bridge team took shelter in the citadel,\" the IMB Piracy Reporting Centre said in a statement. Cyrus Moody, a manager at IMB, said the vessel\'s captain and chief engineer \"were killed in the shooting.\"