It was unclear whether the suspects were headed toward the mosque, which is located about a five-minute drive from the blast.
The bomb was transported by two people on a motorcycle. One official said both riders were killed along with a passerby.
There was no confirmation of what the target may have been, or if the device went off accidentally.
The cleric at the mosque had also recently invited Christians to break the Ramadan fast with Muslims this weekend.
“We were informed that some people riding on a motorcycle dropped an explosive device,” said Musa Ilallah, an official with the National Emergency Management Agency.
Red Cross official Shehu Umar Abdul said the two bombers and a passerby were killed.
A bomb explosion has occurred on Tuesday in Kaduna metropolis, killing four people, in what suggests a fresh wave of attack on the north’s political capital.
A witness told PREMIUM TIMES that the explosion occurred along the busy Ali Akilu road in the city centre.
The explosive device, a security source said, exploded accidentally in the hands of two men, who were travelling with it on two motorcycles.
The men are believed to be members of the extremist Boko Haram sect.
A loud bang rang out after the explosive went off, shaking buildings around the area.
Several people around the explosion were also affected by the blast, and the casualty figure from the incident may rise, our sources say.
Men of the Joint Task Force, JTF, have arrived the area and have cordoned off the scene.
Spokespersons of the police and the JTF could not be reached yet for comments
More details later…