The new cluster of storms, which followed a system that spawned the massive twister that killed more than 120 people in Joplin, Mo., on Sunday, moved into the Oklahoma City area Tuesday evening as worried commuters rushed home.

Several tornadoes touched down in Oklahoma City and its suburbs, killing at least eight people and injuring at least 70 others, authorities said. Among those killed was a 15-month-old boy, and searchers were looking for his missing 3-year-old brother.

The storms killed two people in Kansas and four in Arkansas, and may have killed a man in Texas whose burned body was found near a downed power line.

A storm advancing from the south set off tornado sirens in and around Kansas City, Mo., on Wednesday. At least two weak tornadoes touched down in or near the suburbs of Overland Park and Harrisonville, but there were no immediate reports of injuries or significant damage, meteorologist Julie Adolphson said.

A twister also touched down in the city of Sedalia, 75 miles east of Kansas City, damaging several stores and causing minor injuries, authorities said.