The residents of the Sharon village home, including a 60-year-old woman, were taken to the hospital suffering from blast injuries, burns and shrapnel wounds, Israel's emergency medical services Magen David Adom said on Twitter.
A 6-month-old infant was among the injured, which also included at least three bystanders who were attempting to flee the area.
MDA said it received a call about the rocket at 5:22 a.m. and dispatched EMT and paramedics to the area.