A 4-year-old is dead and another child seriously hurt after they were struck by a van driver in a Brooklyn neighborhood Monday morning.

Police say the children were hit shortly after 9 a.m. on 67th Street near P.S. 205 Clarion School in Bensonhurst. Parts of 67th Street and 20th Avenue were blocked off for the police investigation.

The driver of the vehicle, a 2008 GMC Savanna van, was heading south when he struck the two boys, police said. Video shows the van come to a stop 30 yards from the scene of the accident and wait for almost 10 seconds, before taking off. The driver would voluntarily return to talk with police shortly after, however. Police said he was unaware he had even hit a child, let alone two.

The 4-year-old, identified as Yoshi Balaban, of Staten Island, was pronounced dead at the scene. The other child, a 6-year-old boy, was taken to Maimonides Medical Center in critical condition. It is believed he will survive.

Hours after the accident, volunteers were seen scrubbing the blood off the street at the scene of the incident — a busy spot on school mornings with public school kids heading into their school on one side of the street and religious school students headed into the yeshiva on the other.

It was not clear which school the students were attending, or if the van that struck them was transporting other children. Similar vans were seen picking up students from the yeshiva after school, hours later. A representative of the school declined to comment.

An NYPD investigation was ongoing, but the department said that no criminality was suspected.