The United States on Friday sent an envoy to Ethiopia to seek an end to renewed fighting and condemned neighboring Eritrea for re-entering the conflict in the northern Tigray region.

US Special Envoy Mike Hammer will travel to Ethiopia this weekend and “advise that all parties should halt military operations and hold peace talks,” White House press secretary Karine Jean-Pierre said.

“We condemn Eritrea’s re-entry into the conflict, the ongoing TPLF offensive outside of Tigray and the Ethiopian government’s airstrikes,” she told reporters.

Fighting in the northern region resumed last week after a five-month lull, daunting hopes of a peaceful resolution to the nearly two-year war and an end to a humanitarian crisis that has seen Tigray suffer from widespread hunger.

“There is no military solution to the conflict,” said Jean-Pierre.

“All parties should exercise restraint and we call for de-escalation from all actors, particularly to allow humanitarian assistance and essential services to resume for all parties in need.”

The Ethiopian government and the rebel Tigray People’s Liberation Front (TPLF) have traded blame for starting recent hostilities.

The TPLF, once Ethiopia’s dominant force, on Thursday accused historic rival Eritrea of ??redeploying troops in a major offensive involving Ethiopian troops.