STONE TOWN/DAR ES SALAAM - Muslim protesters clashed with police in Tanzania's commercial capital and on the semi-autonomous island of Zanzibar on Friday, raising religious tensions in the east African country.

In Dar es Salaam, protests against the arrest of a hardline Muslim cleric turned violent, while in Zanzibar, supporters of an Islamist separatist group have repeatedly fought police over the disappearance of their spiritual leader.

The violence has raised concerns of an escalation in religious tensions in relatively stable and secular Tanzania, east Africa's second-largest economy.

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