Rock icon Carlos Santana suffered a medical emergency before his concert in San Antonio, Texas, on Tuesday, and the performance was postponed, according to reports.

The San Antonio Fire Department told MySanAntonio.com that a medical crew responded to a possible fainting around 5 p.m. at the Majestic Theatre and that the 77-year-old was transported to an area hospital.

Citing sources, TMZ wrote that the collapse occurred during a soundcheck. Video obtained by the entertainment site purportedly shows Santana being taken on a gurney into a waiting ambulance but the transfer is mostly obscured by staff.

His manager, Michael Vrionis, said the cause was dehydration.

“Mr. Santana was at the venue (Majestic Theatre) preparing for tonight’s show when he experienced an event that was determined to be dehydration,” Vrionis said in a statement to the theater on Facebook. “Out of an abundance of caution and the health of Mr. Santana, the decision to postpone the show was the most prudent course of action. He is doing well and is looking forward to coming back to San Antonio soon as well as continuing his US Tour.”

HuffPost has reached out to Santana’s team for an update.

Dehydration was also reportedly behind Santana’s collapse during a concert in 2022.

He underwent a heart procedure in late 2021.

Santana, who’s considered one of rock ‘n’ roll’s most innovative guitarists, exploded on to the scene with a memorable performance at Woodstock with his band of the same name in 1969.