Security forces have shot an assailant during an attack on the police headquarters in Istanbul in which two policemen were injured, Doğan News Agency reported on April 1.The assailant opened fire on police stationed at the entrance of the building in Istanbul’s Fatih district with a long-barreled weapon.The female assailant, who was shot dead on the spot, has been identified as Elif Sultan Kalsen, a member of the illegal far-left group the Revolutionary People’s Liberation/Party Front (DHKP/C).Kalsen was previously announced as a terror attack suspect and a suicide bomber on several occasions.The police closed one of the main roads of the city, Vatan Street, to traffic immediately after the attack.The attack came a day after two suspected members of the outlawed far-left group, the Revolutionary People’s Liberation Party-Front (DHKP-C), took a prosecutor hostage in an Istanbul courthouse, before all three were killed during a late night confrontation with the police.The DHKP-C has recently threatened to attack police stations in Turkey.