Nearly half of the students arrested inside New York City schools in July through September were under the age of 16, according to a report on school arrests by the New York City Police Department that was released Monday...The Police Department released the figures without commenting on them to the New York Civil Liberties Union, which then released them to reporters...Donna Lieberman, the executive director of the New York Civil Liberties Union, said that because the period covered by the data includes only 40 to 50 school days, depending on the type of school, the number of arrests and summonses “raises serious concerns.” “We don’t have any comparative period against which to evaluate this,” she said. “But I think that looking at the disproportionate impact of the summonses and arrests on black males, we have to think about it in the context of the mayor’s expressed concern about the future of and the problems facing young men of color.”