Francis Kahata gave the Harambee Stars a shock lead in the 36th minute and, after nearly an hour of fruitless toiling, Nigeria forced a point through Oduamadi three minutes into time added on.
Cameroon claimed top spot in Group I from Libya, who play DR Congo tomorrow, as Samuel Eto'o scored a brace in a 2-1 win over Togo. The Anzhi Makhachkala striker's 42nd-minute penalty was cancelled out by Dove Wome in first-half stoppage time, but Eto'o managed to turn home a winner eight minutes from full-time.
Second-placed Niger could have reduced the gap if they had secured a positive result in Burkina Faso. However, Niger instead slipped to third after suffering a comprehensive 4-0 defeat to Burkina Faso in Ouagadougou.
The Menas were up against it from the third minute when Jonathan Pitroipa notched and further strikes from Aristide Bance (36), Charles Kabore (78) and Prejuce Nakoulma (86) fired Burkina Faso into second place, where they lie six points shy of Congo.
In tonight's other games, Côte d'Ivoire threw down the gauntlet to Group C rivals Tanzania with a comprehensive 3-0 win over Gambia. Second half goals from Wilfried Bony (49), Yaya Toure (59) and Salamon Kalou (70) pushed the Elephants four points clear at the top with Tanzania hosting Morocco tomorrow.
Senegal, however, can be caught by Uganda in Group J after being held to a 1-1 draw at the Stade du 28 Septembre. Moussa Sow (39) put the 2002 World Cup quarter-finalists on track for a five-point lead but Amaro's 75th-minute equaliser gives Uganda the chance to catch up should they take any points from Liberia tomorrow.
And, buoyed by a superb opener from Thabo Matlaba, South Africa closed out a 2-0 win over the Central African Republic to replace Ethiopia at the top of Group A. The Orlando Pirates left-back thundered the ball home from 40 yards in the 34th minute and the shellshocked Wild Beasts were helpless to resist when Bernard Parker made the points safe 20 minutes from time.
Elsewhere, substitute Wahbi Khazri scored the winner as Tunisia resisted a Sierra Leone rally to win 2-1. Oussama Darragi's 57th-minute opener was cancelled out by Alhassan Kamara in the 74th minute but Khazri ensured Nabil Maaloul's men a five-point lead in Group B.