Port-Au-Prince, Haiti (CNN) -- Hip-hop singer Wyclef Jean heard "the sound of the boom" and then realized he was "grazed by a bullet" in Port-au-Prince Saturday night, the eve of Haiti's presidential runoff election, Jean told CNN. 

A Haitian national police spokesman said that Jean was treated at a hospital for an injury, but he would not confirm if it was from a bullet or from glass. 

The wound was superficial and "he is doing well," Jean spokeswoman Cindy Tanenbaum said. 

Jean said he suffered the wound on his hand soon after stepping out of his car to talk on his phone. 

He was treated by a doctor at a hospital and released, Tanenbaum said. 

Jean would not comment on if he suspected he was targeted by a shooter. "I can't even speculate," he said. 

The police investigation was stalled by Jean's refusal to speak to police about the incident, according to Garry Desrosiers, a spokesman for the Haitian national police. 

Jean has been helping the presidential campaign of popular musician Michel Martelly, who is on the ballot against former first lady Mirlande Manigat in Sunday's pivotal presidential runoff election. 

"It was nothing," said Damien Merlo, a spokeman for the Martelly campaign. "He's fine and out and about getting out the vote for us." Final results of the runoff will be released on April 16, according to officials. 

Jean called Sunday's vote "historical." 

"This was done, the majority of it, with technology," he said. "It's going great because this moment in history is being defined with the technology, Facebook, Twitter, SMS, Livestream." 
Where did he get hurt?
Jean said he suffered the wound on his hand