Live video and Twitter feeds at bottom of post.

If you want to mark a day when the Egyptian civil war started, this may be that day.

Breaking reports indicate that pro-Muslim Brotherhood protesters — it’s unclear if just protesters or an organized armed group — attempted to storm an army barracks where Mohamed Morsi was being held, and the army responded with gunfire killing dozens of protesters.

Via NBC News:

At least 42 were killed and 322 injured in clashes early Monday near the Republican Guard headquarters in the Egyptian capital, according to a Ministry of Health source.

Supporters of deposed President Mohammed Morsi had been holding a sit-in near the compound.

Reuters cited the Egyptian military as saying “a terrorist group” had tried to storm the building early Monday. A Ministry of Defense official said that 200 people were arrested after protesters attacked the site around 4 a.m. local time (10 p.m. ET on Sunday). Some were armed with guns, Molotov cocktails and knives, according to the official. One officer was killed and six troops wounded, the military said.

However, Morsi’s Muslim Brotherhood and its allies accused security forces of attacking protesters. NBC News was not immediately able to reconcile the differing accounts.

Updates:

Video livestreams (More here):

Watch live streaming video from ontveglive at livestream.com

On Twitter:

Follow the #Egypt and #June30 hashtags: