“The three gunmen came on a motorcycle and opened fire on their victims who had just parked outside a house,” Kano state police spokesman Mustapha Abubakar told AFP.
“They killed three, two men and a woman, while the fourth escaped unhurt,” he added.
Abubakar said one of the victims was engaged to the woman who escaped the attack at the Kawon Maigari area of the city.
The two other victims were friends helping the couple with their wedding plans.
No arrest has been made although investigations were ongoing, the spokesman said.
It was not clear who was behind the attack, but Boko Haram Islamists have carried out targeted killings in the city, especially on security personnel and residents they accuse of providing incriminating information about the sect.