An 8-month-old girl was bitten by a family pit-bull dog and died from her injuries Wednesday in Miramar, police said. The baby was in the care of a grandmother during the attack, Miramar Police Officer Yessenia Diaz said outside a home in the 2400 block of Kingston Drive. Nearby, a distraught man was being comforted by two women. The male pit bull was 3 or 4 years old and had been raised by the family since it was a puppy, Diaz said. Its sibling and mother, both pit bulls, were also in the home.