London, April 22 -- Four people were injured after a clash broke out between two groups at a gurdwara in Germany's Moers city, prompting a large-scale security response, including special forces, according to German authorities and media reports. The incident occurred on Sunday during prayer time at the Sikh community centre when an altercation broke out between two groups present at the site, the Wesel district police said in a press release. "Four people sustained minor injuries, including one who suffered a cut," police said on Sunday, adding that arrests have been made. "Because witnesses reported hearing gunshots, special forces were called in," the release said. Police have not confirmed the exact cause of the altercation or the natur...