The FBI has opened a civil rights investigation into the arson and vandalism of an African-American church in Mississippi, where "Vote Trump" was spray-painted on an outside wall.

Greenville Mayor Errick Simmons called the fire and graffiti a "heinous, hateful, cowardly act."

The fire blackened the sanctuary's pews, pulpit and walls, but the shell of the church is still standing.

Fire Chief Ruben Brown Sr. estimated that it was 80 percent destroyed. He says authorities are offering an $11,000 reward for information leading to arrest and conviction of whoever did it.