Police in Sudan have fired tear gas at protestors in Kassala, according to eyewitnesses, during one of the biggest protests against President Omar al-Bashir.
It was the first time protestors took to the streets in Kassala since anti-government demonstrations began in December last year.
The protestors are calling for the removal of al-Bashir, the general-turned-politician, who has ruled the north African country since 1989.