This two picture combination shows: on the left, Bosnian Serb Leader Radovan Karadzic in an April 1996 file photo during the Bosnian Serb assembly session in Pale, some 16 kilometers (10 miles) east of Sarajevo, and on the right, Karadzic in an undated photo released by Belgrade's "Healthy Life" magazine Tuesday July 22, 2008, made at an undisclosed location in Belgrade with glasses, long white hair and a beard. (AP Photo)

BELGRADE, Serbia (AP) — Serb nationalists skirmished with riot police in the capital Tuesday, lashing out against the new Western-leaning government that captured war crimes suspect Radovan Karadzic.

Karadzic’s lawyer vowed to appeal Serbia’s plan to extradite the former Bosnian Serb chief to a U.N. war crimes court.

Riot police deployed in downtown Belgrade to keep about 200 members of the extremist Obraz group under control. The demonstrators threw stones and clay pots at the officers, chanting ‘‘treason!’’ and trying to break through police cordons.

Five demonstrators and a policeman were injured, doctors at Belgrade emergency clinic said.

‘‘This is a hard day for Serbia,’’ said Tomislav Nikolic, leader of the ultranationalist Serbian Radical Party, adding that Karadzic was ‘‘a legend of the Serbian people.’’

Nikolic vowed his party will do ‘‘all in its power’’ to topple the pro-Western government.