Gunmen have taken control of 2 Kenya polling stations
Farah Maalim said Monday that the attacks took place after nightfall.
Gunshots and an explosion rang out in the city of Garissa as the gunmen stormed the two polling stations. It wasn't immediately clear if the attackers took any hostages.
The gunmen were in control of election material.
Separate attacks on Kenya's coast killed 19 people early on Monday.
There are eight contenders for the presidential post in Kenya, but the frontrunners are current Prime Minister Raila Odinga and Deputy Prime Minister Uhuru Kenyatta, who, according to polls, have about an equal chance of winning.
Voice of Russia, aljazeera.com