by ROBERT BURNS                                                                                                                                                                           Associated Press National Security Writer

(WASHINGTON, AP) — A top U.S. general says the gunship attack on a hospital in Afghanistan that killed 42 people occurred because of human errors, process errors and equipment failures and that none of the crew knew they were striking a trauma center.

No criminal charges have been leveled against U.S. military personnel for mistakes that resulted in last’s year’s attack on the civilian hospital in Afghanistan operated by the medical charity Doctors Without Borders. The group has called the attack a war crime.

Gen. Joseph Votel, the new head of U.S. Central Command, said Friday that the trauma center was on a no-strike list but that the gunship crew didn’t have access to the list.