Authorities say violent clashes overnight between protesters and police in the Macedonian capital Skopje left 38 police officers and one protester injured, while 30 people were detained.

Interior Minister Gordana Jankuloska said Wednesday that six of the officers were seriously injured and hospitalized. Describing the clashes as "a brutal attack on the police," she said protesters had thrown eggs, bottles and stones and used metal bars.

More than 1,000 people had gathered late Tuesday in front of the government building to protest the 2011 death of 22-year-old Martin Neskoski, who was beaten by police during postelection celebrations.

The clashes broke out hours after Macedonia's opposition leader accused the country's prime minister of attempting to cover up Neskoski's death.