La Mafia lead singer Oscar De La Rosa is suffering from head wounds after being assaulted and attacked in Houston outside a club by an unruly fan.

According to the band’s co-founder Armando Lichtenberger Jr., 53-year-old De La Rosa was the victim in an unprovoked attack on Monday and is currently resting at home with a head injury.

Lichtenberger said the singer and his driver were knocked unconscious by an unknown man who wanted a picture with the singer, but was kicked out of the club for another incident.

"This person was in the club and had wanted a photo with Oscar. And sometimes when he goes out for entertainment he doesn't like taking pictures," Lichtenberger told ABC affiliate WLS. “He sucker-punched the driver, knocked him half unconscious and then he went at Oscar and started pounding on his face. A sucker punch is the worst thing. He didn’t get to defend himself at all. It happened so fast.”

Houston police are searching for the man, who attacked De La Rosa after being kicked out of the bar, but have not made any arrests yet. WLS reported a man has been identified and charges are expected soon.

Lichtenberger said the incident happened outside a gay bar called Blur Bar in Houston and the suspect is a Hispanic man.

De La Rosa is currently at home recovering, having lost two teeth and suffered facial cuts and eye damage for which he had to get stiches. Worst of all, De La Rosa’s vision in one eye could be limited.

"Right now he has lost, he is at 60 percent and they don't know yet if there will be permanent damage," Lichtenberger said.

The band also released a statement on the La Mafia Facebook page, which read: “Oscar De La Rosa was assaulted around 1:30 AM this morning leaving a local bar in Houston. He is still in trauma care at Memorial Herman Hospital (sic). He has suffered severe face lacerations and possible damage to his right eye. A police report has been filed and the identity of the assailant has been confirmed, assault charges will be filed as soon he is located.”

La Mafia, which first started in 1980 in Houston, is considering the option to cancel future performances because of the attack.

The band, which won a Grammy in 2006 for the album “Nuevamente,” is best known for its Tejano music and the song “Me Estoy Enamorando.”