Boston-area media report that the lawsuits were filed Wednesday in Suffolk Superior Court on behalf of the families of Daniel Abreu and Safiro Furtado. Each seeks $6 million.
The men were sitting in an SUV in the city's South End in July 2012 when another SUV pulled up and someone inside opened fire. Nobody has been criminally charged in the deaths, but Hernandez has been identified by police as a suspect.
The 24-year-old Hernandez is being held without bail after pleading not guilty to murder in the 2013 shooting death of 27-year-old Odin Lloyd in North Attleborough. Lloyd was dating the sister of Hernandez's fiancee.
Hernandez is now facing four lawsuits, including one by Lloyd's family and another by a former friend who alleges Hernandez shot him in the face.