Authorities were searching for two people missing after a Friday night boating crash in western Wisconsin that killed two others.

A Minnesota man set to get married Saturday was injured, one person from his wedding party was dead and two others were missing after their open-deck boat collided with a speedboat on the Chippewa River north of Eau Claire, Wis. A man on the speedboat also was killed.

Both boats were traveling at speeds of more than 20 mph just before 10 p.m. Friday. "It was a glancing, head-on" crash, said John Andersen, chief of inspection for the Chippewa Fire District. None of the boaters was wearing life jackets, he said.

The bridegroom, Leo Pohl, 29, of Buffalo, and five others were on a Princecraft boat, which has open seating like a pontoon boat, that collided with a Larson speedboat with two people aboard, said the Chippewa County Sheriff's Department. The Princecraft's driver, Robert Romanshek, 56, of Eau Claire, and four people on that boat were thrown from it. A sixth person, Matthew Overhauser, 27, was found dead on the Princecraft, which was found a half-mile downstream.

Romanshek, Greg Voight, 29, of Buffalo and Pohl swam to shore; they were treated at an Eau Claire hospital and released. Dive teams searched Saturday for the two missing passengers, a relative of Pohl's, Luke Pohl, 25, and another wedding party member, Matthew Simonson, 28.

Romanshek, who is related to Pohl's fiancée, was arrested. Authorities will determine if alcohol played a role.

The speedboat driver, Mark Michels, 50, of Eau Claire, was killed on impact. His passenger, Carol Oller, 49, of Hayward, Wis., was seriously injured and is hospitalized. After the crash, the speedboat circled out of control until it ran ashore. The crash occurred near the city of Wheaton.

Leo Pohl was to be married to Maura Romanshek, 27, also of Buffalo, at the Enchanted Barn in Hillsdale, Wis., according to the venue's site.

Their neighbor, Melissa Schreiber, and five other Buffalo neighbors were about to drive to the wedding Saturday when they heard the tragic news.

"We couldn't wait to see them. They were excited," Schreiber said. "

The Associated Press contributed to this report. Kelly Smith • 612-673-4141