BERLIN (AFP) - German authorities said Sunday they had arrested four alleged Islamists on suspicion of illegally obtaining weapons . The four men, aged between 22 and 27, were seized Saturday night and their apartments searched, said police in Cologne, near to Bonn where festivities Monday were due to be attended by Chancellor Angela Merkel. "As it could not be excluded that a crime was being prepared with these weapons, the men were arrested as quickly as possible," police said in a statement.