Republican frontrunner Donald Trump stormed into a Nevada caucus location Tuesday evening as conservative media mogul Glenn Beck stumped for Ted Cruz.

The scene unfolded live on MSNBC at the caucus site set up in Palo Verde High School’s gymnasium.

“Donald Trump has just walked into this location,” an MSNBC reporter said on-air, noting Beck was still “speaking on behalf of Ted Cruz.”

It was not clear if Trump knew beforehand that Beck was speaking at the location when he made his entrance.

Beck, who has endorsed Cruz, has been at odds with Trump for months now, slamming the businessman on his radio program, Twitter and elsewhere. The billionaire has repeatedly returned fire, going after Beck in a personal manner.

UPDATE: Beck responded on Facebook:

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