'Bachelorette' Star Kasey Kahl — Accused of Bashing Woman's Nose in Drunken Nightclub Attack

Former “Bachelorette” star Kasey Kahl smashed a woman in the face at a Fresno nightclub, giving her a bloody nose … this according to the alleged victim … though Kasey claims it was all in self-defense.

broke the story … Kahl was arrested early Sunday morning for drunk and disorderly conduct at Club Habano”s nightclub … though now we know his arrest stemmed from a VIOLENT drunken altercation.

According to the police report, obtained by , Kahl was accused of attacking a man named Richard Chaney outside the club … and then smashing Chaney”s girlfriend in the face when she tried to break up the fight.

Chaney told police Kahl was “very intoxicated” when he approached him and his GF … and Kahl “talked about that he had sex with a friend of hers in the past.”

Chaney told cops … he told Kahl to “go away” … but “Kahl became physically violent and struck Chaney several times in the face and head … causing his mouth to bleed.”

Chaney”s GF, Rene Idsinga, told cops a similar tale … and also admitted she tried scratching Kahl”s neck to get him to stop beating Chaney. Idsinga claims Kahl struck her in the face during the melee, causing her nose to bleed.

Cops say Rene”s nose was still bleeding when they arrived to the scene — as was Chaney”s mouth.

Police also spoke with Kahl — who allegedly told them he had “a lot” to drink … but insisted he DID NOT instigate the fight. Instead, he claimed, “It was self defense.”

According to police, Kahl said he wanted to press charges against Chaney and his GF — and vice versa.

Cops say Kahl was so “intoxicated and belligerent” … they felt he couldn”t take care of himself … so they booked him into Fresno County Jail for his own safety.

Kahl had previously told he was innocent of all accusations.