Foyle Sinn Fein MLAs Martina Anderson and Karen Mullan have announced they will not be standing in next year's Assembly elections.
It follows a major review of the party's structure in Derry in the wake of a number of poor election performances.
It is understood that Ms Anderson and Ms Mullan were recently asked to stand down from their Stormont seats as part of the review.
In a Twitter message this evening, Ms Mullan said she would not be seeking a nomination to stand for Sinn Fein at next year's election.
"It has been a great privilege to represent and work for the people of Derry. I will continue to be a SF activist and I look forward to a new chapter in my life," she wrote.
Posting on Facebook, Ms Anderson also revealed her intention not to stand in the Assembly election.
"There is a privilege in being a public representative standing up for people. I will miss not doing that," she wrote.
As part of the review, it is also believed that the senior management team of Sinn Fein in Derry has been asked to stand down from their roles.
If you have a story or want to send a photo or video to us please contact the Derry Now editorial team on 028 7129 6600 for Derry City stories Or 028 7774 3970 for County Derry stories. Or you can email email@example.com or firstname.lastname@example.org at any time.
Subscribe or register today to discover more from Derrynow.com
Buy the e-paper of the Derry News and the County Derry Post here for instant access to Derry's premier news titles.
Keep up with the latest news from Derry with our daily newsletter featuring the most important stories of the day delivered to your inbox every evening at 5pm.