Abdallah al-Thani "submitted his resignation late Sunday at a meeting with parliament speaker Aguila Saleh", spokesman Ezzedine el-Faleh said in a statement received by AFP.
Libya, which sits on the continent's biggest crude oil reserves, has endured almost a decade of violent chaos since the NATO-backed uprising against Kadhafi.
The United Nations Support Mission in Libya on Monday expressed "grave concern regarding reports that one civilian was killed, three were injured, and a number of other demonstrators arrested" in Al-Marj.
Benghazi,
The head of Libya's parallel government installed in the country's east has handed in his resignation following street protests against corruption and falling living standards that turned violent, his spokesman said Monday.