According to Buzzfeed, the FBI confirmed on Sunday that federal officials are investigating a series of fires that recently hit four predominantly black Southern churches, although the agency denied there was any evidence connecting the blazes at this time.

“They’re being investigated to determine who is responsible and what motives are behind them,” an FBI spokesperson told the site. “I’m not sure there is any reason to link them together at this point.”

Of the fires—which broke out this week in Tennessee, Georgia, North Carolina and South Carolina—three have been ruled arsons, with the cause of the fourth still being investigated. From Raw Story:

On Monday, someone set fire to College Hills Seventh Day Adventist Church in Tennessee, according to local WATE. The arsonist placed bales of hay outside the church doors and lit them ablaze, fire officials told the station. They also burned the church van.

On Tuesday, God’s Power Church of Christ in Georgia was intentionally set on fire, authorities told ABC News. Electronics and other equipment were also stolen in the early morning fire. Authorities told reporters there is “no evidence” of a hate crime.

On Wednesday, Briar Creek Baptist Church in North Carolina burned in the middle of the night, causing $250,000 in damage, NBC News reports. Authorities are investigating whether the intentional blaze was a hate crime. It took 75 firefighters to bring it under control.

On Friday, Glover Grove Missionary Baptist Church in South Carolina, was virtually destroyed in an overnight blaze, the Aiken Standard reports. While the cause of the fire is still under investigation, the FBI has been called in.

But while the arsonists have yet to be identified, at least one church leader has already called for compassion.

“Honestly I can speak for this church,” Briar Creek Road Baptist Church pastor Mannix Kinsey told WBTV on Wednesday. “That we’ve already forgiven them and we want to move forward. And we are hoping this is an opportunity for Christ to show himself in their hearts.”

[Image via WBTV]