Fire erupted near Microsoft office in Israel's Beer Sheva, accoding to CNN reports

Several fires were burning in a street in Israel's southern city of Beer Sheva, close to a tech park that houses a Microsoft office, CNN reported on Friday.

Israel and Iran's air war entered a second week on Friday and European officials sought to draw Tehran back to the negotiating table after 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 programme 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. Reuters could not independently verify the death toll from either side.

Iran has said it is targeting military and defence-related sites in Israel, although it has also hit a hospital and other civilian sites.

Israel accused Iran on Thursday of deliberately targeting civilians through the use of cluster munitions, which disperse small bombs over a wide area. Iran's mission to the United Nations did not immediately respond to a request for comment.

Russian President Vladimir Putin and Chinese President Xi Jinping both condemned Israel and agreed that de-escalation is needed, the Kremlin said on Thursday.