In January Eritrea reportedly requested to cross the border in order to get sand for a road, but instead occupied a hilltop in the region.[13] On April 16, Eritrea is reported by Djibouti to have set up fortifications and dug trenches on both sides of the Djiboutian border near Ras Doumeira.[2] Djibouti, in a letter to the UN calling for intervention, claimed new maps put out by Eritrea showed Ras Doumeira as Eritrean territory. Eritrea denied it had any problems with Djibouti.[14]