Are the images in Bootstrap Templates free to use?

I am modifying the “One Page Wonder” template for a site, and I would like to know if the images of musicians in the template as well as the headlines are free to use.

The headlines are definitely free to use, and I am 99.99% sure the images are as well, as they’re from free stock photo websites like Pexels and Unsplash.

Thanks Printninja!