CLEAN : UN says new claims of child abuse by foreign troops in C Africa

Hussein announced alarming news of sexual exploitation and abuse allegations against foreign military forces, primarily from 2014, recently uncovered. A UN team in the Central African Republic interviewed girls who reported abuse by foreign soldiers, with some linked to the EU's U 4 operation.

How many girls reported being sexually exploited or abused by foreign soldiers?

What operation were the abusers attached to, as mentioned in the text?