The Phoenix Fire Department said the crash occurred at Central Avenue and Dobbins Road between a van and a semi-truck. Three people were seriously injured after two cars crashed in Phoenix on Thursday morning. The Phoenix Fire Department said the crash occurred at Central Avenue and Dobbins Road between a van and a semi-truck. Four people were involved, but three were seriously injured. The three people who were seriously injured were a child, a 19-year-old woman and a man in his 40s, the department said. They were all taken to a local hospital for treatment. The fourth person was evaluated and did not want to be taken to the hospital. The cause of the crash was not immediately known.