The Myanmar military has rejected a proposal by three ethnic armies to begin cease-fire talks instead vowing further retaliation for armed offensives and ambushes, a military spokesman said Tuesday, RFA reported.

The Brotherhood Alliance of ethnic armies — the Arakan Army (AA), the Ta’ang National Liberation Army (TNLA), and the Myanmar National Democratic Alliance Army (MNDAA) — extended the invitation to begin peace talks in a statement issued Monday.

The Brotherhood Alliance, which has not signed the Nationwide Ceasefire Agreement, also announced Monday that it was extending a current unilateral cease-fire from June 1 to Aug. 31.