FILE - In this July 6, 2019, file photo, people view a memorial at the site where seven bikers riding with the Jarheads Motorcycle Club were killed in a collision last month in Randolph, N.H. State transportation officials in Massachusetts are expected to be questioned during a legislative oversight hearing on Monday, July 22, 2019, in Boston, about the Registry of Motor Vehicles' failure to suspend the commercial license of the truck driver charged in the crash that killed the seven motorcyclists in New Hampshire. (Paul Hayes/Caledonian-Record via AP, File)
FILE - In this July 6, 2019, file photo, people view a memorial at the site where seven bikers riding with the Jarheads Motorcycle Club were killed in a collision last month in Randolph, N.H. State transportation officials in Massachusetts are expected to be questioned during a legislative oversight hearing on Monday, July 22, 2019, in Boston, about the Registry of Motor Vehicles' failure to suspend the commercial license of the truck driver charged in the crash that killed the seven motorcyclists in New Hampshire. (Paul Hayes/Caledonian-Record via AP, File) Credit: Paul Hayes

More than a month after a crash in New Hampshire that killed seven motorcyclists, federal safety officials have issued a report that provides no fresh clues as to the cause of the tragedy.

In its preliminary report Wednesday, the National Transportation Safety Board summarized the details behind the June 21 crash in which a pickup truck driven by 23-year-old Volodymyr Zhukovskyy crashed into the bikers in Randolph. The report affirms early reports that Zhukovskyy crossed the center of the road and collided with the bikers.

Zhukovskyy, of West Springfield, Mass., has pleaded not guilty to negligent homicide. Officials say Zhukovskyyโ€™s license should have been suspended because of a drunken driving arrest.

On Tuesday, a spokeswoman for Attorney General Maura Healey confirmed an investigation into Westfield Transportation, which operated the truck.