Two people were shot at a cemetery south of Milwaukee on Thursday, police said. 

Racine police described the shooting as a "critical" incident and urged  people to stay away. Police said multiple shots were fired in the  direction of a funeral service Thursday afternoon. 

Sgt. Kristi Wilcox said a juvenile was treated and released and a second  person was flown to a hospital in Milwaukee. It was not immediately  known if any suspects were in custody. 

Racine police said on social media that numerous shots were fired about  2:30 p.m. at Graceland Cemetery in Racine, about 30 miles (48  kilometers) south of Milwaukee.  

Ascension All Saints Hospital, which is next to the cemetery, said it is  treating an undisclosed number of victims from the shooting. 

The shooting comes the day after a gunman killed his surgeon and three other people at a Tulsa medical office. 

It's the latest in a series of mass shootings in United States including  the deadly school shooting in Uvalde, Texas, and an attack on a  supermarket in Buffalo, New York. 

Ascension All Saints Hospital in Racine was on lockdown "out of an  abundance of caution" following the shooting, the hospital said in a  statement. It later lifted the lockdown. 

Racine Mayor Cory Mason released a statement saying the "heinous  shooting at a cemetery while a family was already mourning the loss of a  loved one is a new low for these perpetrators of violence in our  community. The violence has got to stop!" 

Mason said he was instructing the police department to actively enforce  the city's juvenile curfew ordinance through the weekend, meaning anyone  under 18 must be home by 11 p.m.