Election violence in Liberia – in pictures

Opposition party supporters flee their party's headquarters as it is hit by teargas canisters fired by police Photograph: Rebecca Blackwell/AP

Supporters of the opposition party Congress for Democratic Change (CDC), whose presidential challenger, Winston Tubman, withdrew from the race, protest in Monrovia Photograph: Luc Gnago/Reuters

Nigerian UN peacekeepers, right, confront Liberian riot police who stormed the CDC compound in Monrovia Photograph: Finbarr O'Reilly/Reuters

A CDC supporter holds a placard calling for the boycott of the second round of the presidential election Photograph: Issouf Sanogo/AFP/Getty Images

Opposition supporters carry a wounded man as they look for a way to send him to a hospital during clashes Photograph: Rebecca Blackwell/AP

Tubman (right) is comforted by a friend after riot police fired teargas and live rounds into his party's headquarters, killing at least one person Photograph: Finbarr O'Reilly/Reuters

An opposition supporter carries a spent teargas canister as he awaits the advance of Liberian police forces, during running clashes near the opposition's headquarters Photograph: Rebecca Blackwell/AP

Opposition supporters set up a burning barricade after Liberian riot police stormed the CDC compound Photograph: Finbarr O'Reilly/Reuters

Nigerian UN soldiers and Liberian police chase down a Liberian police commander who had been firing live rounds in clashes with opposition supporters Photograph: Rebecca Blackwell/AP

A Liberian policeman in a gas mask walks past a UN armoured vehicle as he approaches the opposition party's headquarters Photograph: Rebecca Blackwell/AP

People wait to cast their votes in Monrovia Photograph: Luc Gnago/Reuters