Clashes break out in Athens over injured protester

By the Associated Press | May 12, 2011 | 1:15 PM EDT

Protesters lay on the street after clashes with riot police during a 24-hour strike in Athens, Wednesday, May 11, 2011. Riot police made heavy use of tear gas and stun grenades to disperse youths throwing stones and petrol bombs during a march attended by 20,000 people to protest the Greek government's harsh austerity measures.(AP Photo/ Petros Giannakouris)

ATHENS, Greece (AP) — Demonstrators are clashing with riot police in central Athens during a protest over the severe injury of a protester during an anti-austerity march in the city the previous day.

Youths are hurling broken chunks of marble and firebombs at riot police, who are responding with volleys of tear gas and stun grenades.

The clashes broke out Thursday evening during a demonstration by about 5,000 protesters from left-wing groups and unions amid condemnations of alleged police brutality over the wounding of a 31-year-old man in Wednesday's protest.

The man is in critical condition after undergoing brain surgery.