“Alcohol-related issues” sent 22 fans to the hospital and 50 into protective custody, while several more are headed to court after a country music concert at the Xfinity Center in Mansfield that headlining superstar Keith Urban labeled “nutso.”

“Last evening’s Keith Urban concert was not anticipated to present with the volume of issues handled, but measures were in place to provide appropriate and adequate care and protection to all patrons. As a result, although there was a higher than expected volume, appropriate care was available through the expandable model,” Mansfield Police Chief Ron Sellon and Fire Chief Neil Boldrighini said in a joint statement today.

In today's Boston Herald:

In addition to an endless loop of ambulances, authorities said a half-dozen police and fire departments responded to the venue to assist Mansfield as dozens of fans of Urban’s “Raise ‘Em Up Tour” fell ill, passed out and injured themselves.

“In total, Fire and EMS attended to 46 medicals resulting in 22 transports mostly alcohol-related,” Sellon and Boldrighini said. “The large number of medicals in a shortened time of approximately three hours caused the activation of a phase one EMS plan utilizing ambulances from five mutual aid communities. Police dealt with a steady stream of intoxicated persons as well, resulting in over 50 people being taken into protective custody and a number of others arrested for alcohol-related issues.”

It appears Urban wasn’t completely oblivious to the crowd getting out of hand. He tweeted a video message immediately after the show at @KeithUrban singing the Bee Gees hit “Massachusetts.”

“What a great night tonight. It was killer. Gosh, up on the lawn tonight, that was nutso. It was so cool,” the Australian heartthrob told his fans. “Anyway, if you came tonight, thank you very much for giving us all the love and energy. Boston Strong, I love you. Night-night.”

Jacqueline Peterson, spokeswoman for Live Nation, which owns the Xfinity Center, said more than 18,000 people were in attendance last night.

“Our team works hard to offer a great concert experience for fans and an overwhelming majority of fans enjoyed the concert,” Peterson said.