Protesters and police clash at G20 summit in Hamburg, Germany

A protester is detained by German police officers during the G-20 summit in Hamburg, Germany.

A demonstrator holds up her hands as she faces policemen during a protest in Hamburg, Germany, where leaders of the world’s top economies gather for a G20 summit.

Riot police run throgh smoke in Hamburg, Germany, where leaders of the world’s top economies gather for a G20 summit.

Protesters clash with German police officers as they try to block a bus during the G20 summit in Hamburg, Germany.

A demonstrator dressed as a clown performs next to policemen during a protest in Hamburg, Germany, where leaders of the world’s top economies gather for a G20 summit.

Riot police chase protesters in Hamburg, Germany, where leaders of the world’s top economies gather for a G20 summit.

Riot police use water cannon against a protester throwing road signs in Hamburg, Germany, where leaders of the world’s top economies gather for a G20 summit.

A policeman and a protester clash in ‘Schanzenviertel’ quarter closed to the ‘Rote Flora’ building ahead of the G20 summit in Hamburg, Germany.

A protester waves a flag next to a fire on street near ‘Rote Flora’ building in ‘Schanzenviertel’ quarter ahead of the G20 summit in Hamburg, Germany.

Police forces use water cannons to disperse protestors ahead of the G20 summit in Hamburg, Germany.

Police officers are silhouetted by fires lit by demonstrators during a protest against the G20 summit in Hamburg, Germany.

Protesters pound drums during a demonstration ahead of the G20 summit in Hamburg, Germany.

Protesters stand in front of a water cannon during a demonstration ahead of the G20 summit in Hamburg, Germany.

A protester throws a can during a demonstration ahead of the G20 summit in Hamburg, Germany.

A protester plays a recorder in front of riot police during a demonstration ahead of the G20 summit in Hamburg, Germany.

Police lead away a bleeding protester during a demonstration ahead of the G20 summit in Hamburg, Germany.

Police arrest a protester during a demonstration before the G20 summit in Hamburg, Germany.

Police officers use water cannons during a demonstration against the G-20 summit in Hamburg, Germany.

Protesters take off after riot police storm a demonstration against the G20 summit in Hamburg, Germany.

Riot police move through the smoke from a smoke bomb during a demonstration against the G20 summit in Hamburg, Germany.

Protesters take part in a demonstration at the Fish Market ahead of the G20 summit in Hamburg, Germany.

Protesters throw flares at riot police during a demonstration against the G20 summit in Hamburg, Germany.

Demonstrators gather at the harbor before an anti-G20 march in Hamburg, Germany.

Police officers keep back protesters during an anti-G20 demonstration in Hamburg, Germany.