Since this morning FARDC and M23 resumed fightings. The FIB is stuck between its 2 mandates of Protection of Civilians and active force operations... So they do nothing for now.
M23 rebels clash with army in eastern Congo

General Sultani Makenga, M23's military commander, told Reuters its forces were attacked at 4 a.m. local time (0200 GMT) at Kanyamohoro, around 15 km (10 miles) north of Goma, the largest city in eastern Democratic Republic of Congo.

"They attacked us," Makenga told Reuters by telephone. "We are going to defend our positions."

An army spokesman was not immediately available for comment.

A Reuters reporter in Goma said the fighting was intense and on-going.

The resumption of hostilities comes days after peace negotiations broke down in the Ugandan capital Kampala, triggering a military build-up on both sides.
http://www.trust.org/item/20131025080636-8c4ty/