Egypt is on the brink of chaos as security forces clash with supporters of deposed President Mohamed Morsi. The violence has claimed 149 lives in Cairo, according to Egypt's Health Ministry, while leaving more than 1,400 wounded.

From the midst of the unrest comes this video, which reportedly shows pro-Morsi protesters forcing an armored police vehicle off a bridge. Adel Abdel Ghafar, a researcher at the Centre for Arab and Islamic Studies in Australia, tweeted this photo of the vehicle in mid-air:

In the aftermath of the violence, Mohamed ElBaradei, Egypt's interim vice president, announced his resignation, withdrawing crucial liberal support from the military-led government.

"It has become too difficult to continue bearing responsibility for decisions I do not agree with and whose consequences I fear," ElBaradei wrote in a letter. "Unfortunately those who gain from what happened today are those who call for violence and terror, the extremist groups."

Morsi was overthrown on July 3, only two years after winning the presidency following the ouster of longtime leader Hosni Mubarak. The current interim president, Adly Mansour, has declared a month-long state of emergency, authorizing the military to help riot police in their efforts to restore order.