Around 3,000 people have been killed in clashes between M23 rebels and government forces, and thousands more have been displaced after the worst escalation of fighting in more than a decade.

Rwandan-backed M23 rebels in Democratic Republic of Congo are seeking to advance south towards Bukavu, the capital of South Kivu province, in an attempt to expand their area of control in the country's east after capturing the city of Goma.

The Democratic Republic of Congo has been mired in conflict for years. As fresh fighting surges in the east, the roots of today’s violence can be traced back to old problems.