South Florida cops were searching for a man and his infant son on Wednesday — to grill the dad about three women fatally shot in a Miami-Dade County home, authorities said.

An Amber Alert was issued early Wednesday for 1-week-old Andrew Caballeiro — who was last seen a day earlier in Miami, and may be with his 49-year-old father, Ernesto Caballeiro, who was driving a white Ford passenger van, according to the Florida Department of Law Enforcement.

The van, which has Florida tags, also has two decals on it, one of which reads “Nesty School Services.” The other warns other drivers that the vehicle is “transporting children,” authorities said.

Cops in Miami-Dade County responded to a home at Southwest 219th Street and 187th Avenue on Tuesday and found three women dead, a police spokesman told the Miami Herald.

All three victims — identified as Hispanic women between the ages of 40 and 80 — had been shot. They were the infant’s mother, grandmother and great-grandmother, a law enforcement source told the newspaper later Wednesday.

The gruesome discovery was made after a relative tried to contact the women and then went to their home, where Ernesto Caballeiro also lived, the Herald reports.

“We are attempting to locate him,” police spokesman Lee Cowart told the newspaper.

Police said Ernesto Caballeiro had not been identified as a suspect in the three slayings, WFLA reports.

Anyone with information about Caballeiro’s whereabouts should call Miami-Dade police at (305) 471-2400.