Indian Oil Corporation and Air India entered the semi-finals of the 66th International Obaidullah Gold Cup Hockey tournament at Bhopal with easy wins.While IOC trounced hosts Bhopal Red 6-2, Air India defeated Malaysia XI 3-2 at the Aish Bagh stadium at Bhopal yesterday. In the third match, ONGC defeated BPCL 3-2. With this win, ONGC stood at the top of Group-B with six points while BPCL has earned only one point from two matches.