SIDOARJO, Indonesia — Rescuers searching for people trapped under a collapsed school in Indonesia on Thursday are hoping to dig a tunnel, at the risk of destabilising the rubble, to reach an estimated 59 still missing. "The rescue operation must be accelerated," he urged. Complex operationThe rescue operation is complex as vibrations happening in one place can impact other areas, said Mohammad Syafii, head of the National Search and Rescue Agency. But the operation could last longer than seven days if people are still missing, a search and rescue agency official told AFP. Signs of life have been detected in several areas, said rescue official Emi Freezer of the National Search and Rescue Agency.