Karachi PSX Attack Highlights: Pakistan’s stock exchange building in Karachi is under attack by armed men. According to local media four men stormed the PSX building and started indiscriminate firing. They attacked with grenade and guns. A gunbattle ensued between Pakistani security forces and the armed men. It added that the building is in a high security zone and also has head offices of many commercial private banks. The Pakistan State Bank is located in the premise as well as the headquarters of several national and international financial institutions. Reuters quoted Karachi police chief Ghulam Nabi Memon saying that four attackers have been killed, they had come in a silver Corolla car. It is not known as yet if any other assailant/s are at large.