A Libyan man being held by German police for allegedly plotting an attack on the Israeli embassy in Berlin was planning to use firearms in his assault, prosecutors said. The man with suspected ties to the terrorist group Islamic State (IS) was detained in a raid by a heavily armed police unit in a Berlin suburb on Saturday, but law enforcement agencies said nothing about how the suspect planned to carry out the attack. More information was revealed by the Federal Prosecutor’s Office in the western German city of Karlsruhe on Sunday. The suspect, who has been named only as Omar A in line with G…