Former Utah Gov. Jon Huntsman Jr. (R) slammed former Massachusetts Gov. Mitt Romney (R) on his foreign policy experience and Texas Gov. Rick Perry (R) and the rest of the Republican presidential field for being anti-science.

Huntsman, who most recently served as the Obama administration's ambassador to China, has been focusing his attacks on Romney and Perry, the front-runners for the GOP presidential nomination.

Romney "certainly doesn't have hands-on foreign policy experience," Huntsman said in an interview with Bloomberg TV set to air Friday.

Huntsman recently received a great deal of attention for saying global warming is a scientific fact, a viewpoint not shared by many Republicans. Perry has voiced skepticism that the threat of global warming is more than just theoretical. Huntsman said some members of the GOP field are in danger of indicating to the public they are out of the mainstream.

"I'm not going to get into the name game. But suffice it to say if you're going to run from climate science, if you're going to run from other mainstream scientific principles, evolution among them, I think you're suggesting to a whole lot of people out there that you're out of the mainstream," Huntsman said. "Rick [Perry] has been outspoken in that regard. I think on science he's out of the mainstream."