ADEN, (Pakistan Point News - APP - 20th july, 2016) - A bomb killed four policemen on Wednesday in Yemen's second city Aden, a security official said, in an attack claimed by the Islamic State group. Another six officers were wounded in the blast in the southern port city, the official told AFP. The IS group issued a statement claiming the bombing. Security officials said that the assailant approached carrying a bag and asked to eat lunch with the troops. He left the bag behind and it exploded as soon as he was gone, the sources told AFP.