President Muhammadu Buhari, his Liberian and Ghanaian counterparts, Ellen Johnson-Sirleaf and John Mahama, will on Tuesday, leave for Banjul to put diplomatic pressure on President Yahya Jammeh to transfer power to President-elect Adama Barrow. The UN Security Council made the plan known while briefing newsmen after a closed-door meeting by the 15 members on the political situation in The Gambia