After thrashing Chhattisgarh 4-1 in their previous tie, Railways defeated Sikkim 5-1 after dominating the proceedings throughout the match in the Group B encounter at Gopal Maidan.
Sushil Kisku scored a brace -- first at the 16th minute and then converted a penalty five minutes later, while his team-mate Kenistan C also struck twice in 72nd and 79th minutes. Charlesnand Ral netted the last goal in the 74th minutes.
Sikkim scored a consolation goal when Dawa Lepcha converted a penalty in the 44th minutes.
Railways were now on the top of the chart with six points from two outings.
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In another match played at JRD Tata Sports complex, Odisha exhibited good combination and passing skills to register a 3-0 win over Chhattisgarh.
Surendra Soren opened the account through a brilliant field goal in the 30th minute while Antarjami Naik scored a brace post-lemon break in 54th and 68th minutes.
Odisha had drawn 1-1 against Sikkim in their previous encounter.