People concerned about a plan to bring trains carrying ethanol through Cambridge and Somerville will get a shorter meeting tonight with no presentation by state Department of Transportation officials, said a legislative aide to city councillor and state Rep. Tim Toomey.

“Due to the tragic and disturbing nature of the events that occurred at the Boston Marathon, the Cambridge state legislative delegation has chosen to abbreviate a meeting regarding the transportation of ethanol,” said aide Dan Weber in a press release. “Residents who still wish to attend will have an opportunity to discuss their questions and comments with their elected representatives. Residents who attend the meeting will also be able to get copies of the state’s safety study presentation.”

A full meeting with Department of Transportation officials will be rescheduled, with the new date and time announced in coming days, he said.

A message was left with Weber asking to clarify the reasons for leaving out the state officials’ presentation.

The meeting is at 6 tonight at the King Open School, 850 Cambridge St.