10:55 AM PT -- Peter Thomas has broken his silence on his recent arrest ... taking full responsibility for what went down last week.
In the clip, filmed from a plane and posted on his Instagram Friday, Peter says his phone has been blowing up and wanted to address the incident -- claiming he refused to blow for a breathalyzer test during the ordeal, and was in the hospital due to his high blood pressure.
He says he willingly turned himself in, and it was a quick process ... thanking the Cobb County Police Department for how they handled the whole thing.
Peter admits he's never been arrested for DUI and is mindful -- adding his younger brother died as a result of drunk driving in the past ... before thanking everyone for their concerns.
Cynthia Bailey's ex-husband, Peter Thomas, has been arrested for DUI, TMZ has confirmed ... after allegedly weaving between lanes and flying through a red light.
According to the docs, obtained by TMZ, officers in Atlanta say they spotted Peter weaving without tags on his SUV last week, so they followed him -- claiming he blew through a red light after exiting the interstate.
Cops later obtained an arrest warrant for Peter, and he was charged with DUI alcohol, as well as a slew of other traffic-related charges. According to journalist Kiki Monique, Peter was released later on the same day after posting his $3k bail.
The former "Real Housewives of Atlanta" first got in front of the camera in season 3 along with his girl, Cynthia Bailey -- the 2 got engaged and married on the show, but he bowed out of the series in season 9 when he and the model got divorced.