The U.N. chief has visited a Palestinian refugee camp in northern Lebanon that was destroyed in fierce battles against al-Qaida-inspired militants almost a decade ago.

Amid tight security, Secretary-General Ban Ki-Moon inspected the Aamaq school at Nahr el-Bared, where officials explained on a map the ongoing reconstruction of the camp.

The Lebanese military fought a three-month battle in 2007 against the al-Qaida-inspired Fatah Islam group inside Nahr el-Bared. The Lebanese army crushed the group, but the clashes also killed more than 170 soldiers.

Ban is on a two-day visit to Lebanon along with the World Bank Group president. He is also scheduled to visit a social center for Syrian refugees in Tripoli and an informal refugee settlement in the eastern Bekaa Valley.