Iran has announced that its talks with P5+1 will be held on 21 and 22 January at Istanbul in Turkey.According to Iranian news agency IRNA, Iranian Foreign Ministry spokesman Ramin Mehmanparast told reporters in Tehran today that parties of the talks have agreed on the date to review the common points of cooperation. Five permanent members of UN security council and Germany are known as P5+1 group.Iran's Spokesman also said that that Iran will legally sue Israel over assassinating a nuclear scientist one year ago as it has collected some proofs. Iran yesterday claimed that it has dismantled an Israeli spying network and arrested a group of people who were linked to the assassination of its nuclear scientist Massoud Ali-Mohammadi in July 2010.