3 UFO in a triangular formation over Fortaleza

On October 6, 2017, a witness took a photo of three unidentified lights flying in a triangular formation over Fortaleza, in Brasil.

Witness statement:

I was going to the window to observe the landscape, when I came across 3 bright objects flying in a triangular formation. They were not planes, because where I live is near an airport and I constantly see planes and I know them very well. The objects made no sound and were glowing with a yellow light. They were flying slowly. And strangely the biggest object was flying in front of the others. I just took a picture and left the window in fear because i was alone in my house and they were approaching.