CALI/PEREIRA, Colombia — Hopes of finding more survivors from the powerful earthquake that rocked Colombia early this week were fading on Thursday as rescue workers narrowed their searches, while families in the worst-hit areas waited for news of missing relatives. In Cali, the country's third-largest city, crews have turned their attention from a search-and-rescue effort to debris removal at most sites, a sign the disaster response was entering a grimmer phase after the crucial first 72 hours. The 7.4-magnitude quake struck shortly after 7:30 a.m. local time on Monday, toppling apartment blocks, damaging homes, schools and hospitals and sending residents into the streets across western Colombia, home to the country's coffee farms. At least 273 people were killed — many in Cali and Pereira, a city in the coffee region —and more than 3,800 injured, according to government data on Thursday morning. It also said 377 people were still reported to be missing. In Pereira, Enrique Marin said he drove more than 10 hours from Bogota after getting a call from a friend who told him Marin's