Texans coach Gary Kubiak was in stable condition after he collapsed as he was running off the field at halftime at Reliant Stadium Sunday night, the team said.

Kubiak, 52, was evaluated for stroke-like symptoms, a person close to the situation said. Kubiak did not suffer a stroke, the person said, but is undergoing further evaluation, including an MRI.

The Texans said that Kubiak did not suffer a heart attack but released no other details other than to say the coach was conscious and had a strong heart rate before leaving the stadium. He was joined at the hospital by his family.

Texans general manager Rick Smith said in a postgame interview on NBC that Kubiak was “lightheaded and dizzy and went to a knee.”

Smith said the team will “have to assess” when Kubiak will return to the team. “Obviously, there’s a lot of information to be gathered, and I don’t want to speculate at this point.”

A TV replay of Kubiak’s fall showed the coach grimacing in pain while personnel surrounded him. Kubiak remained on the ground several minutes before being wheeled into the northwest tunnel of Reliant.

“I saw him on the ground and I was asking, ‘What happened?’ ” said Texans defensive coordinator Wade Phillips, who filled in the rest of the game as head coach. “That’s kind of how it was with everybody, with everybody asking, ‘What happened? What happened? What happened?’

“There was a lot of unknown. … It was a shock to everybody.”

As Kubiak was removed from the stadium, the majority of the Texans’ other coaches raced from a bottom-level hallway to an elevator, rushing to the press box area for the start of the second half. Offensive coordinator Rick Dennison was in the group and took over play-calling for the Texans in the third and fourth quarters.

Phillips remained with the team’s players as the Texans lost to the Indianapolis Colts 27-24.

“It was really weird,” quarterback Case Keenum said. “We were very worried … but once we found out he was OK, we were able to stay focused.”

Said offensive lineman Duane Brown: “It was like all the air was taken out of us. Seeing your coach on the ground is not a sight you expect.”

Colts coach Chuck Pagano said his team was notified at halftime about Kubiak’s collapse.