It is understood that the driver tested positive for drugs.
The accident occurred on Thursday afternoon.
The boy was attacked at a school in Can Pastilla on Wednesday.
The five include one woman.
There had previously been a fight between two boys.
Total population has risen by 85,000 in the past ten years, but the percentage to the age of 14 has dropped.
Be prepared for additional checks at point of entry.
The children arrived tired but happy.