Eritrea has denied Ethiopia's claims that its soldiers crossed into Ethiopian territory, calling the accusations false. On Sunday, Ethiopia's foreign minister, Gedion Timothewos, sent a letter to his Eritrean counterpart demanding Eritrean troops withdraw. Ethiopia accused Eritrea of "outright aggression" and said it was working with Ethiopian rebels, supplying them with weapons. Eritrea responded by calling the accusations part of a "spiral of hostile campaigns against Eritrea for more than two years." The two countries have a long history of tension after Eritrea split from Ethiopia three decades ago. They fought a border war from 1998 to 2000 that killed over 100,000 people. A peace deal was never fully carried out. Relations improved after Ethiopia’s Prime Minister Abiy Ahmed visited Eritrea in 2018 and earned a Nobel Peace Prize. Eritrea supported Ethiopia’s army against Tigrayan forces in the recent civil war, but tensions have risen again. Ethiopia claims Eritrea has moved troops deeper into its north-eastern border and is conducting joint military drills with rebels in the north-west. "These are not just provocations but acts of outright aggression," said Timothewos. One key issue is Ethiopia’s demand for access to the sea through Eritrean ports. Abiy called losing a port a "mistake". The Ethiopian foreign minister invited Eritrea to withdraw troops so both sides could discuss this issue. Eritrea called the accusations "patently false and fabricated" and said it does not want to escalate tensions. Last week, Abiy accused Eritrean troops of massacring civilians in the Ethiopian city of Aksum during the Tigray war, an allegation Eritrea has denied. Ethiopia now claims Eritrea supports rebels opposing the peace deal. Ethiopian police said they seized ammunition sent from Eritrea to rebels last month. Eritrea denied this, accusing Ethiopia of "floating false flags" to justify war. The situation remains fragile as both countries exchange accusations and deny aggression. The world watches closely for signs of peace or new conflict.