Officer injured when man throws caustic substance at face

NORFOLK, Va. — Authorities say a Norfolk police officer suffered significant injuries when a man threw a caustic substance into the officer's face.Police say a man approached the police sergeant shortly before 10 a.m. Monday and threw an unknown substance at the officer's face. Police say the officer received what appear to be significant burn injuries.Police say it appears the attack was unprovoked. The officer, who was transported to the hospital, has not been identified.Police say the m