Police in Massachusetts say a man accused of kidnapping his 1-year-old son has been located in Mexico.

Lowell Police said Monday that 37-year-old Fillemom De Lima, of Lawrence, Massachusetts, is being held by Mexican authorities at an immigration detention center.

De Lima and his son were last seen on Jan. 9. Lowell Police and the FBI traced him to Mexico City.

The boy was reunited with his mother, Mahalia Alexander-Paggi, Sunday night at Logan International Airport in Boston.

It's unclear whether De Lima is represented by an attorney who could comment on his behalf.

Police say if he made it to Brazil, as police believe he intended to, they may not have been able to reunite the boy with his mother.

Several federal agencies helped with the investigation.