( CNN) Libya's renegade General Khalifa Haftar has “agreed to comply” with the terms of an existing ceasefire agreement in Libya, according to German Foreign Minister Heiko Maas.

Haftar's administration, in eastern Libya, has often been at odds with the GNA in Tripoli, since the fall of Libya's strongman leader Moammar Gadhafi. Last year, at least 1,000 people been killed in and around Tripoli between April and July, according to the World Health Organization, as Haftar's forces and other militias attempted to take over the capital.

The nine-month campaign appeared to pause over the weekend, when Haftar accepted a conditional ceasefire. But on Monday, he abandoned peace talks with the GNA in Moscow, leaving without signing a draft agreement.