WASHINGTON (Reuters) – At least 12 people were injured following a fire and explosion at a residential high-rise apartment building in Silver Spring, Maryland, that then partially collapsed, local authorities said on Thursday. Heavy smoke was seen pouring out of the four-story building in a video posted by Montgomery County Fire and Rescue Service, which said the fire was now “basically contained.” It was not immediately known what caused the fire. At least one dozen people were hurt, including five individuals with critical injuries, Montgomery County fire officials said. “There are injuries,…