Kaduna state spokesman Reuben Buhari asked residents Monday to remain calm and cooperate with security forces.
Kaduna state officials loosened a 24-hour curfew imposed after the attacks, saying people could be on the streets from 2 to 6 p.m.
The third blast, in the northern state of Kaduna, was confirmed by emergency management officials, but no information on casualties or damage was available.
And now as Christians marked Easter Sunday, it seems that Boko Haram may be behind the two car bombs that exploded in a crowded area in Kaduna.
Things changed around the year 2000, when Kaduna was hit, for the first time, by religious conflict attributed to the introduction of Islamic law in the state.
However, elections for powerful state governors will be delayed for two days, until Thursday, in two of the worst affected states - Kaduna and Bauchi, the electoral commission announced.
After criticism flared when he flew on a prearranged trip to Brazil while Kaduna burned, Mr Jonathan felt obliged to sack his national security adviser and his defence minister.
If it had been available when the Kaduna river burst its banks last week, driving 5, 000 people from their homes, the government could swiftly have identified the worst-affected areas.
One, run by a pastor and an imam who once tried to kill each other but have since become friends, has calmed a little the troubled city of Kaduna.
"There is no Nigerian soldier that goes out on the streets to just kill innocent Nigerians, " Col Sani Kukasheka Usman told the BBC at the First Division headquarters in Kaduna.
Last month Boko Haram attacked three churches in Kaduna, a northern city that had been largely untouched by the insurgency, killing 21 and igniting four days of violence that left another 100-plus dead.
The source, who lives at the family home in Kaduna in northern Nigeria, said the son informed his family in the text message that he was leaving school in Dubai to move to Yemen.
The military statement said Mr Zangina was leader of Boko Haram in the "North Central part of Nigeria and co-ordinator of most of the suicide attacks and bombings in Abuja, Kaduna, Kano, Jos and Potiskum".
But its introduction has contributed to outbreaks of violent conflict between Muslims and Christians, especially evangelicals, in the middle belt of the country where the two communities rub up against each other, in cities like Kaduna and Jos.
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