French police killed up to 300 people in 1961, throwing some of them into the River Seine to drown them.
The protests come as tensions rise between civilian and military rulers.
Liverpool's Mohamed Salah becomes the joint top-scoring African in Premier League history, as he equals Didier Drogba's record of 104 goals.
Roberto Firmino nets a hat-trick and Mohamed Salah scores another wonderful goal as Liverpool spoil Claudio Ranieri's first game as Watford boss.
Mr Hancock's appointment to the UN's economic commission for Africa was announced earlier this week.
Despite mass starvation in northern Ethiopia, aid officials are not calling the situation a famine.