The truck driver was arrested after the crash Friday in West Yorkshire, The Daily Telegraph reported.
Pritpal Singh, an accountant, told the Telegraph he was about one-third of a mile away when the crash occurred and walked up to the scene. He said the minibus was knocked over by the impact.
The group of 21 women were traveling from South Elmsall in Yorkshire to Liverpool for a weekend celebration of an upcoming wedding. Police said one young woman was killed in the crash and everyone else injured, some of them seriously.
Investigators did not identify any of the women, but residents of South Elmsall said the dead woman was Beth Jones, 18, and the bride-to-be is Stephanie Firth, 24.
A neighbor said Firth and her fiancee's mother were badly injured, with the older woman in intensive care.
"Stef was so excited for this hen do. She's getting married in a couple of weeks and she was really looking forward to spending the weekend in Liverpool celebrating with her friends," the neighbor said. "I heard the news this morning and my heart just sank."