At least 25 people were killed and dozens of others injured on Monday in two suicide blasts in the capital city of the central African nation of Chad.A suicide bomber, riding a motorcycle, detonated his explosives-laden vest in front of the central police station in the capital city of N'Djamena -- situated only a few metres from the Presidential Palace and the French embassy in Chad, Xinhua news agency reported.The national police school was the location of the second attack. It is situated between the headquarters of the Constitutional Council and Chad-China Friendship Hospital.This is the first time the Chadian capital witnessed such bomb attacks. Even though the identity of the attackers has not yet been revealed, authorities in N'Djamena fear this could be the work of the Nigerian islamist terror group, Boko Haram.The toll is likely to increase, officials at the bombing site said.