NZRPA head Rob Nichol said he offered his assistance to the two Kiwis once the media reports broke this morning. Provale, the French players' association, have representatives in the city and are helping, he said.
In a tweet, former Wallaby Kimlin said: "I want to clarify that I wasn't arrested. I was purely at the police station to help establish a timeline."
New Zealand Rugby chief executive Steve Tew said this morning: "I can say that no one likes to read headlines of that nature.
"I don't think it reflects well on New Zealand or New Zealanders. But we can't be responsible for every New Zealander who goes offshore and plays rugby while they are on that trip."
The questioning of the New Zealanders comes after the arrest of former All Black Ali Williams for the alleged buying of cocaine on a recent night out in Paris, and revelations that World Cup winner Dan Carter was stopped while driving while under the influence of alcohol.
Grenoble club president Eric Pilaud told AFP he "felt sick" at the allegations at his players, adding: "if the case is confirmed, it's serious."