New storms bear down on Arkansas

• Story Highlights
• NEW: About 1,000 customers in Arkansas lost power as tornado sirens blared
  
• NEW: Flights at the Little Rock, Arkansas, airport were delayed nearly an hour
  
• NEW: Near Lillian, Texas, a gas worker, lost part of his arm in the storm
  
• Wind, hail damaged 200 homes and businesses in Oklahoma town
  
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