Two eight-year-old girls from Attard were injured when they were hit by a car in Triq Hal Warda, near the Attard Primary School at around noon.
One of the girls suffered grievous injuries, the other slight.
The girls pressed the traffic lights but crossed the streets without waiting for the lights to turn to green, the police said.
They were hit by a green Toyota Vitz that was being driven by a 44-year-old woman from Mosta.