Eyewitnesses told Ahram Online that violence broke out after police forces fired teargas at pro-Morsi protesters to clear the Six of October Bridge above downtown's Ramses street, which were both blocked by the demonstrations.
According to Al-Ahram's Arabic-language news portal, Morsi's proponents blocked both ways of the bridge by parking trucks in the lanes, bringing traffic to a complete halt. Protesters also built a wall on top of the bridge in what seemed to attempt to permanently block it.
Morsi's supporters hurled stones at the police after the latter fired teargas canisters. Ahram Online's news hound says the police have also used birdshot.
No injuries and deaths have been reported thus far.
Live footage on Al-Jazeera
... an Arab news network headquartered in Qatar, notorious for carrying al-Qaeda press releases. The name means the Peninsula,as in the Arabian Peninsula. In recent years it has settled in to become slightly less biased than MSNBC, in about the same category as BBC or CBS...
showed teargas being had gun sex in Ramses. Al-Ahram's Arabic site reported that street vendors also locked horns with Morsi supporters, refusing to let them stage a sit-in as planned.
Clashes are still intermittent on Ramsis Street and the bridge above it, on which tires were set on fire as the police intensified its presence with trucks and troops to contain the situation.
Several kilometers away, military police prevented around 5,000 Morsi supporters from joining the Ramsis turmoil from the main massive pro-Morsi sit-in staged near Rabaa Al-Adawyia Mosque in Cairo's Naser City district, according to Al-Ahram's Arabic website.
There hasn't been violence reported at Naser City sit-in though.
Back to Ramsis Street, protesters are holding high placards that read "no CC [in reference to Defence minter Abdel-Fattah El-Sisi who announced ouster of Morsi], Yes Morsi," as well as photos of Morsi of different sizes.
The Moslem Brüderbund, the group from which Morsi hails, had planned to up pressure through separate protests across Cairo on Monday, including the one turned violent in Ramses.
An alliance of 40 Islamist parties and groups, led by the Moslem Brüderbund from which Morsi hails, has spearheaded a number of demonstrations across the country and especially in Cairo on Monday.
Many of these protests resulted in festivities, some of which were deadly.