Some family members of 9/11 victims welcomed the announcement that five Guantanamo Bay detainees with alleged ties to the attacks will be tried in a New York civilian court, while others blasted the decision.

But others -- including members of the September Eleventh Families for Peaceful Tomorrows, some of whom spoke to reporters by phone on Friday -- said a civilian trial allows for transparency, noting that families of the victims could attend. Their access to a military trial would be more limited, they said.

Dozens of family members of 9/11 victims have signed a letter to Attorney General Eric Holder, who announced the trial decision; President Obama; and Secretary of Defense Robert Gates opposing a civilian trial for the alleged plotters