Authorities searched through rubble and debris in southern Michigan on Saturday after suspected tornadoes tore through the region and killed four people, including a 12-year-old boy, during powerful storms also blamed for two deaths in eastern Oklahoma. First responders from multiple agencies in the Union Lake area near Union City looked for more possible victims and worked to clear roads, authorities said. The National Weather Service said an initial assessment confirmed that an EF3 tornado with winds of at least 150 mph (241 kph) struck the Union Lake area Friday. “Mostly likely there were three distinct tornadoes, but we won’t know 100% for sure until they finish the survey,” said meteorologist Lonnie Fisher of the National Weather Service, adding that the storms intensified rapidly in southern Michigan after hitting northern Indiana.