(CNN) The FBI is investigating a shooting incident that took place early Tuesday morning at two buildings associated with Immigration and Customs Enforcement in San Antonio.

Shots were fired round 3 a.m. local time into one of the buildings, which housed ICE offices, and around the same time at another building nearby, where an ICE contractor was located, according to the FBI.

No one was injured, though federal employees were inside at least one of the buildings.

"We had federal employees who were present, who although they were not hit by the rounds fired, by the grace of God. Had the bullets gone 2 inches in another direction, we could be here today talking about the murder of a federal official," said Christopher Combs, FBI special agent in charge for San Antonio, during a news conference.

Tuesday's shooting came days after immigration authorities arrested nearly 700 workers in a massive sweep at seven Mississippi food-processing plants, which left friends and family members desperately searching for answers as to what would happen to their loved ones.

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