evidence: Egypt's occupation of the Halayeb Triangle, which lies in a mineral-rich border region of the Red Sea, has been a bone of contention for years between Cairo and Khartoum despite an overall improvement in ties since an October summit. [...] "Announcing four of those blocks inside the Sudanese territory of Halayeb is a direct intrusion into Sudan's oil and gas ministry's authority of granting licenses for such explorations in this area," Bushra said. [...] The Halayeb triangle, which is controlled by Egypt, has been claimed by Sudan since the 1950s.