Updated

Amnesty International has called on Egypt's government to launch a "full" and "impartial" investigation into the use of live ammunition by police to disperse protesters last week.

The rights group said Monday that police used excessive and deadly force against supporters of the ousted Islamist president and that, in a number of cases, bystanders or non-violent protesters were caught up in the violence.

The Health Ministry said at least 50 people were killed in the Oct. 6 protests, mostly in Cairo. It was the latest chapter of the turmoil roiling Egypt since the 2011 ouster of longtime autocrat Hosni Mubarak. Political violence has seen an uptick since a July 3 coup ousted Mohammed Morsi, with well over 1,000 of his supporters killed and more than 2,000 jailed.