Tucson police are trying to locate a taxi driver as a potential witness in an investigation into a double homicide.
According to police, a man and a woman were fatally injured and another person seriously injured Wednesday morning when they were run over during an altercation.
Police say the altercation happened after a man and a woman got out of a taxi and were approached by a vehicle. An argument ensued.
Names of the two people killed haven't been released but police say they were a 47-year-old woman and a 32-year-old man.
A 43-year-old woman is hospitalized with injuries described as life-threatening.
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