Israel and Iran's air war entered a second week on Friday as European officials sought to draw Tehran back to the negotiating table after U.S. President Donald Trump said any decision on potential U.S. involvement would be made within two weeks.

Israel began attacking Iran last Friday, saying it aimed to prevent its longtime enemy from developing nuclear weapons. Iran retaliated with missile and drone strikes on Israel. It says its nuclear program is peaceful.

Israeli air attacks have killed 639 people in Iran, said the Human Rights Activists News Agency. Those killed include the military's top echelon and nuclear scientists. Israel has said at least two dozen Israeli civilians have died in Iranian missile attacks.