At least seven Donald Trump supporters needed hospitalization late Tuesday night after a campaign event in Omaha, Nebraska.

In addition, a total of about 30 people needed treatment during the campaign, according to Omaha police.

Thousands of supporters had dyed on the cooling autumn bridge for hours before Trump appeared on the scene.

After the campaign session ended and Trump left his plane, the majority of supporters were even stuck at the scene for hours. The temperature had dropped to frost readings at that time.

If the Twitter embedding does not appear, the reporter Jeff Paulin the tweet can be visited from here.

For thousands of supporters, 40 buses had been ordered for boarding, but leaving the airport still took hours.

According to The Guardian, the first ones left the scene by bus ride around nine in the evening and the latest Trump supporters left the area around midnight.

Trump’s campaign blames local roadblocks for the slowness of the ride.