MINSK,Sept 13 — At least 100,000 Belarusian anti-government protesters flooded the centre of Minsk today, a Reuters eyewitness said, and police detained around 250 people, the Interfax news agency cited the Interior Ministry as saying.

Belarusian leader Alexander Lukashenko is facing a groundswell of public anger after declaring a landslide win at last month’s presidential election that his opponents say was rigged. Lukashenko denies these allegations.  — Reuters