India, April 7 -- Israel attacked a key petrochemical plant at Iran's massive South Pars natural gas field and killed a top Revolutionary Guard commander, putting into question the negotiations aimed at getting the US and Tehran to reach a ceasefire.

Israel's Defence Minister Israel Katz confirmed what he called "a powerful strike on the largest petrochemical facility in Iran" that's responsible for half of the country's petrochemical production.

Israel's military spokesperson, Lt Col Nadav Shoshani, said there would be "no immunity" for Iran as talks progress.  The gas field shared with Qatar is the world's largest and sits under the waters of the Persian Gulf.  The White House did not immediately respond when asked about the...