MILWAUKEE — Authorities are investigating after three vehicles were burned in the Milwaukee driveway of mixed martial arts fighters Anthony and Sergio Pettis.

The fires happened early Thursday morning.

Milwaukee police say it appears accelerant was used to set two vehicles on fire, and the fire spread to a third vehicle in the driveway.

The brothers posted statements on social media. Sergio Pettis asked the Milwaukee community to come together and stop the violence.

Anthony Pettis said he was glad no one was hurt, and said he would do everything he could to find out who is responsible and have them prosecuted.

Anthony Pettis also said: "I am a fighter. I won't be defeated by this."

Anthony Pettis is scheduled to face Max Holloway in UFC 206 in Toronto in December.