CAIRO — At least 820 people were killed and 672 injured after a forceful, 6.8-magnitude earthquake shook Morocco late Friday, the Interior Ministry said. The quake struck around 11:11 p.m. local time (6:11 p.m. Eastern time) in the province of Al Haouz, about 43 miles (70 kilometers) south of Marrakesh, decimating buildings and sending panicked residents in several cities fleeing to the streets in search of safety. The quake was felt in Marrakesh, as well as Casablanca, Rabat, Fez, and other cities.