Norway’s domestic security agency says a bow-and-arrow attack that killed five people appears to have been an act of terrorism.The agency, known by its acronym PST, said Thursday that Wednesday night’s attack in a small Norwegian town “currently appear to be an act of terrorism.”“The investigation will clarify in more detail what the incidents were motivated by,” it said in a statement.It added that the suspect “is known to PST from before, without PST being able to provide further details about him.”Police said Thursday that the Danish man suspected of the attack is a Muslim convert who was previously flagged as having been radicalized.“Attacks on random people in public places are a recurring modus operandi among extremist Islamists.