The boys' and mother's identities have not been released, but police confirmed they are from Staten Island. They were officially listed as missing Tuesday.
The children disappeared after their mother's car became submerged just before 6 p.m. in or near the 400-block of Capodanno Boulevard in South Beach, police said, a stretch of road fronted by beach and marsh on one side and houses on the other.
By Tuesday afternoon, officers were combing the area and draining a marsh off Capodanno Boulevard, where they discovered and removed a blue SUV and silver minivan, but not the boys, SILive.com reported. The search was ongoing Wednesday morning.
So far, the city'd death toll is 22.