A tip led NYC police to a brothel in the Sunset Park section of Brooklyn where they found a container filled with cement and a two-month-old boy buried inside.

Authorities arrested Domingo Salazar and Norma Mendez and charged them with sex trafficking.

Investigators said Salazar, 33, and Mendez, 32, are illegal immigrants from Mexico who forced a young woman into prostitution, viciously abusing her and barring her from getting medical care for her infant son when he became ill last January.

According to reports, in February 2007, Salazar met the woman, whose identity has not been released, in Mexico and got her pregnant.

In November 2007, he smuggled her into the U.S., and shortly thereafter, she gave birth to the baby boy.

Authorities said the woman quickly got a job working at a candy store and Salazar told her she needed to pay him the $2,500 smuggling fee for bringing her into the country.

Authorities said he then forced her into prostitution driving her around the city to visit customers, servicing up to 25 men a night.

When her son became ill in January 2008, authorities said Salazar and Mendez refused her from seeking medical attention for him and after he died, they forced her to bury him in a 10-gallon Rubbermaid container filled with cement.

Authorities are searching for other illegal immigrants  they believe were forced into prostitution.

If convicted, the couple could face up to 15 years to life.