Breaking News: Nigerian city of Jos rocked by twin blasts

Two loud explosions have been heard near a crowded market in volatile central Nigerian city of Jos.

The BBC's Ishaq Khalid in the city says many casualties are feared because the market was very crowded at the time.

It is not clear what caused the explosions in the city, which has seen several outbreaks of deadly clashes between Christian and Muslim groups in recent years.

Islamist group Boko Haram has also previously targeted the area.