Three police officers were injured Sunday after an attack on a security checkpoint in Arab League Street at Agouza area. A security source, who asked to remain anonymous, told Al-Bawaba News that three unknown attackers opened fire on the security checkpoint, wounding three policemen with cartridge bullets, adding that security forces had immediately combed the area to apprehend the attackers. Moreover, an eyewitness said that he saw a truck, which was carrying three gunmen, and then they opened fire on the security checkpoint and fled.