Alabaster Police, in cooperation with U.S. Immigration and Customs Enforcement agents, served a warrant Friday in connection with a two-year investigation into businesses and individuals employing illegal immigrants.

The warrant was served at Rodriguez Construction on Elder Drive as officers moved in while a helicopter hovered above. Alabaster Police Deputy Chief Curtis Rigney said the warrant was executed shortly before 6 p.m. on Friday.

Temple Black, regional spokesman for ICE in New Orleans, said 31 illegal male Mexican immigrants were detained during the raid. Two of the men — a father and son — were released after questioning.

The men are now being held in the Perry County Correctional Center in Uniontown upon deportation back to Mexico.