Czech Prime Minister Bohuslav Sobotka condemned on Sunday an attack on Prague's social center for refugees and homeless people, Sputnik reported.
On Saturday night, a group of unidentified people wearing masks threw rocks and Molotov cocktails at the center. More than 20 people were in the building at the moment of the attack, one of them was injured and hospitalized.
"Violence is unacceptable in democracy. I condemn the attack with Molotov cocktails on the social center 'Clinic' and firmly believe that police will rapidly find those who carried it out," Sobotka wrote on his Facebook page.
About 2,500 people gathered in Prague on Saturday to take part in anti-migrant rallies, as tens of thousands of activists in Germany, Poland, the Netherlands, France, Ireland and Britain protested the growing number of Muslim migrants arriving in Europe under the guidance of the Pegida anti-Islamization movement.