AKIPRESS.COM - Indonesian authorities are hunting for more than 250 inmates who escaped from a prison in the province of West Papua, BBC reports.

The prison break happened Monday as protesters took to the streets in several cities blocking roads, and torching buildings including the jail.

The unrest was triggered by the detention of Papuan students in the city of Surabaya over accusations they had disrespected the Indonesian flag.

Police reinforcements have been sent to Papua ahead of more planned protests.

Thousands of Papuans took the streets of cities including Sorong, Manokwari and Jayapura on Monday.

The prison, in Sorong, was set ablaze and rocks were thrown at prisoners, said justice ministry spokeswoman Marlien Lande.

"258 inmates escaped and only five of them had returned by this morning," Ms Lande said, adding that several guards and employees were injured as they tried to stop the escape.