Clashes broke out between armed Christian and Muslim groups near the central Nigerian city of Jos on Sunday, a Reuters witness said, after Christmas Eve bombings in the region killed more than 30 people.

Buildings were set ablaze and people were seen running for cover as the police and military arrived on the scene in an effort to disperse crowds.

This correspondent saw dozens of buildings on fire and injured people covered in blood being dragged by friends and family to hospital.

The unrest was triggered by explosions on Christmas Eve in villages near Jos, capital of Plateau state, that killed at least 32 people and left 74 critically injured.

The Red Cross said on Saturday it was not in a position to state the total number of deaths caused by the explosions but confirmed that 95 were seriously injured in hospital.

Vice President Namadi Sambo will travel to Jos on Sunday.

“The vice president is on his way to Jos to make an effort to quell this crisis,” Sambo’s spokesman said.

The unrest has come at a difficult time for President Goodluck Jonathan, who is running a controversial campaign ahead of the ruling party’s primaries on January 13.