Dozens of anti-Israel activists clashed with police Saturday as they tried to storm a closed arena where Sweden and Israel were playing a Davis Cup tennis match. The activists hurled rocks and firecrackers at police vans as they tried to break through the barricades set up to keep protesters from the arena. Hundreds of riot police pushed them back using truncheons. There were no immediate reports of injuries. At least five people were detained, police spokesman Lars Hakan Lindholm said. The clashes erupted after about 7,000 people gathered at a square in downtown Malmo to hear speeches condemning Israel's recent operation in Gaza and urging support for Palestinians. Jpost.com staff contributed to this report.